diff --git a/CHANGELOG.md b/CHANGELOG.md
index b685ab0a..f3b03c4a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,9 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [0.8.2] - 2022-11-xx
+### Added
+- [[#110](https://github.com/igiagkiozis/plotly/pull/110)] `LegendGroupTitle` to existing traces.
+
 ### Changed
 - [[#113](https://github.com/igiagkiozis/plotly/pull/113)] Refactored the structure of the examples to make them more accessible, whilst adding more examples e.g. for `wasm`.
 - [[#115](https://github.com/igiagkiozis/plotly/pull/115)] Simplify the function signature of Plot.to_inline_html() so that it just takes `Option<&str>` as an argument.
diff --git a/plotly/src/traces/bar.rs b/plotly/src/traces/bar.rs
index cd768273..16300ae6 100644
--- a/plotly/src/traces/bar.rs
+++ b/plotly/src/traces/bar.rs
@@ -5,8 +5,8 @@ use serde::Serialize;
 
 use crate::{
     common::{
-        Calendar, ConstrainText, Dim, ErrorData, Font, HoverInfo, Label, Marker, Orientation,
-        PlotType, TextAnchor, TextPosition, Visible,
+        Calendar, ConstrainText, Dim, ErrorData, Font, HoverInfo, Label, LegendGroupTitle, Marker,
+        Orientation, PlotType, TextAnchor, TextPosition, Visible,
     },
     Trace,
 };
@@ -51,6 +51,8 @@ where
     show_legend: Option<bool>,
     #[serde(rename = "legendgroup")]
     legend_group: Option<String>,
+    #[serde(rename = "legendgrouptitle")]
+    legend_group_title: Option<LegendGroupTitle>,
     opacity: Option<f64>,
     ids: Option<Vec<String>>,
     width: Option<usize>,
@@ -157,6 +159,7 @@ mod tests {
             .inside_text_anchor(TextAnchor::End)
             .inside_text_font(Font::new())
             .legend_group("legend-group")
+            .legend_group_title(LegendGroupTitle::new("legend-group-title"))
             .marker(Marker::new())
             .name("Bar")
             .offset(5)
@@ -191,6 +194,7 @@ mod tests {
             "visible": "legendonly",
             "showlegend": false,
             "legendgroup": "legend-group",
+            "legendgrouptitle": {"text": "legend-group-title"},
             "opacity": 0.5,
             "ids": ["1"],
             "width": 999,
diff --git a/plotly/src/traces/box_plot.rs b/plotly/src/traces/box_plot.rs
index 35b39f1f..5b8e9c91 100644
--- a/plotly/src/traces/box_plot.rs
+++ b/plotly/src/traces/box_plot.rs
@@ -5,7 +5,10 @@ use serde::{Serialize, Serializer};
 
 use crate::{
     color::Color,
-    common::{Calendar, Dim, HoverInfo, Label, Line, Marker, Orientation, PlotType, Visible},
+    common::{
+        Calendar, Dim, HoverInfo, Label, LegendGroupTitle, Line, Marker, Orientation, PlotType,
+        Visible,
+    },
     Trace,
 };
 
@@ -108,6 +111,8 @@ where
     show_legend: Option<bool>,
     #[serde(rename = "legendgroup")]
     legend_group: Option<String>,
+    #[serde(rename = "legendgrouptitle")]
+    legend_group_title: Option<LegendGroupTitle>,
     opacity: Option<f64>,
     ids: Option<Vec<String>>,
     width: Option<usize>,
@@ -278,6 +283,7 @@ mod tests {
             .jitter(0.5)
             .line(Line::new())
             .legend_group("one")
+            .legend_group_title(LegendGroupTitle::new("Legend Group Title"))
             .lower_fence(vec![0., 1.])
             .marker(Marker::new())
             .mean(vec![12., 13.])
@@ -320,6 +326,7 @@ mod tests {
             "hovertext": ["okey", "dokey"],
             "jitter": 0.5,
             "legendgroup": "one",
+            "legendgrouptitle": {"text": "Legend Group Title"},
             "line": {},
             "lowerfence": [0.0, 1.0],
             "marker": {},
diff --git a/plotly/src/traces/candlestick.rs b/plotly/src/traces/candlestick.rs
index e1b96d0a..2fe6a197 100644
--- a/plotly/src/traces/candlestick.rs
+++ b/plotly/src/traces/candlestick.rs
@@ -5,7 +5,9 @@ use serde::Serialize;
 
 use crate::{
     color::NamedColor,
-    common::{Calendar, Dim, Direction, HoverInfo, Label, Line, PlotType, Visible},
+    common::{
+        Calendar, Dim, Direction, HoverInfo, Label, LegendGroupTitle, Line, PlotType, Visible,
+    },
     Trace,
 };
 
@@ -61,6 +63,8 @@ where
     show_legend: Option<bool>,
     #[serde(rename = "legendgroup")]
     legend_group: Option<String>,
+    #[serde(rename = "legendgrouptitle")]
+    legend_group_title: Option<LegendGroupTitle>,
     opacity: Option<f64>,
     text: Option<Dim<String>>,
     #[serde(rename = "hovertext")]
@@ -140,6 +144,7 @@ mod tests {
         .visible(Visible::True)
         .show_legend(false)
         .legend_group("group_1")
+        .legend_group_title(LegendGroupTitle::new("Legend Group Title"))
         .opacity(0.3)
         .text_array(vec!["text", "here"])
         .text("text here")
@@ -166,6 +171,7 @@ mod tests {
             "visible": true,
             "showlegend": false,
             "legendgroup": "group_1",
+            "legendgrouptitle": {"text": "Legend Group Title"},
             "opacity": 0.3,
             "text": "text here",
             "hovertext": "hover text",
diff --git a/plotly/src/traces/contour.rs b/plotly/src/traces/contour.rs
index fbf5ee15..844f55c2 100644
--- a/plotly/src/traces/contour.rs
+++ b/plotly/src/traces/contour.rs
@@ -6,7 +6,8 @@ use serde::Serialize;
 use crate::{
     color::Color,
     common::{
-        Calendar, ColorBar, ColorScale, Dim, Font, HoverInfo, Label, Line, PlotType, Visible,
+        Calendar, ColorBar, ColorScale, Dim, Font, HoverInfo, Label, LegendGroupTitle, Line,
+        PlotType, Visible,
     },
     private, Trace,
 };
@@ -118,6 +119,8 @@ where
     show_legend: Option<bool>,
     #[serde(rename = "legendgroup")]
     legend_group: Option<String>,
+    #[serde(rename = "legendgrouptitle")]
+    legend_group_title: Option<LegendGroupTitle>,
     opacity: Option<f64>,
     x: Option<Vec<X>>,
     x0: Option<X>,
@@ -187,6 +190,7 @@ where
             visible: None,
             show_legend: None,
             legend_group: None,
+            legend_group_title: None,
             opacity: None,
             x: None,
             x0: None,
@@ -335,6 +339,11 @@ where
         Box::new(self)
     }
 
+    pub fn legend_group_title(mut self, legend_group_title: LegendGroupTitle) -> Box<Self> {
+        self.legend_group_title = Some(legend_group_title);
+        Box::new(self)
+    }
+
     pub fn line(mut self, line: Line) -> Box<Self> {
         self.line = Some(line);
         Box::new(self)
@@ -574,6 +583,7 @@ mod tests {
             .hover_template_array(vec!["ok {1}", "ok {2}"])
             .hover_text(vec!["p3", "p4"])
             .legend_group("group_1")
+            .legend_group_title(LegendGroupTitle::new("Legend Group Title"))
             .line(Line::new())
             .n_contours(5)
             .name("contour trace")
@@ -611,6 +621,7 @@ mod tests {
             "visible": true,
             "showlegend": false,
             "legendgroup": "group_1",
+            "legendgrouptitle": {"text": "Legend Group Title"},
             "opacity": 0.6,
             "text": ["p1", "p2"],
             "hovertext": ["p3", "p4"],
diff --git a/plotly/src/traces/heat_map.rs b/plotly/src/traces/heat_map.rs
index f2ac561c..151b6941 100644
--- a/plotly/src/traces/heat_map.rs
+++ b/plotly/src/traces/heat_map.rs
@@ -4,7 +4,9 @@ use plotly_derive::FieldSetter;
 use serde::Serialize;
 
 use crate::{
-    common::{Calendar, ColorBar, ColorScale, Dim, HoverInfo, Label, PlotType, Visible},
+    common::{
+        Calendar, ColorBar, ColorScale, Dim, HoverInfo, Label, LegendGroupTitle, PlotType, Visible,
+    },
     Trace,
 };
 
@@ -81,6 +83,8 @@ where
     hover_text: Option<Vec<String>>,
     #[serde(rename = "legendgroup")]
     legend_group: Option<String>,
+    #[serde(rename = "legendgrouptitle")]
+    legend_group_title: Option<LegendGroupTitle>,
     name: Option<String>,
     opacity: Option<f64>,
     #[serde(rename = "reversescale")]
@@ -198,6 +202,7 @@ mod tests {
             .hover_template_array(vec!["tmpl1", "tmpl2"])
             .hover_text(vec!["hov", "er"])
             .legend_group("1")
+            .legend_group_title(LegendGroupTitle::new("Legend Group Title"))
             .name("name")
             .opacity(0.99)
             .reverse_scale(false)
@@ -229,6 +234,7 @@ mod tests {
             "hovertemplate": ["tmpl1", "tmpl2"],
             "hovertext": ["hov", "er"],
             "legendgroup": "1",
+            "legendgrouptitle": {"text": "Legend Group Title"},
             "name": "name",
             "opacity": 0.99,
             "reversescale": false,
diff --git a/plotly/src/traces/histogram.rs b/plotly/src/traces/histogram.rs
index dc64609c..f5824057 100644
--- a/plotly/src/traces/histogram.rs
+++ b/plotly/src/traces/histogram.rs
@@ -8,7 +8,10 @@ use serde::Serialize;
 #[cfg(feature = "plotly_ndarray")]
 use crate::ndarray::ArrayTraces;
 use crate::{
-    common::{Calendar, Dim, ErrorData, HoverInfo, Label, Marker, Orientation, PlotType, Visible},
+    common::{
+        Calendar, Dim, ErrorData, HoverInfo, Label, LegendGroupTitle, Marker, Orientation,
+        PlotType, Visible,
+    },
     Trace,
 };
 
@@ -134,6 +137,8 @@ where
     hover_text: Option<Dim<String>>,
     #[serde(rename = "legendgroup")]
     legend_group: Option<String>,
+    #[serde(rename = "legendgrouptitle")]
+    legend_group_title: Option<LegendGroupTitle>,
     marker: Option<Marker>,
     #[serde(rename = "nbinsx")]
     n_bins_x: Option<usize>,
@@ -400,6 +405,7 @@ mod tests {
             .hover_text("hover_text")
             .hover_text_array(vec!["hover_text_1", "hover_text_2"])
             .legend_group("legendgroup")
+            .legend_group_title(LegendGroupTitle::new("Legend Group Title"))
             .marker(Marker::new())
             .n_bins_x(5)
             .n_bins_y(10)
@@ -433,6 +439,7 @@ mod tests {
             "hovertemplate": ["hover_template_1", "hover_template_2"],
             "hovertext": ["hover_text_1", "hover_text_2"],
             "legendgroup": "legendgroup",
+            "legendgrouptitle": {"text": "Legend Group Title"},
             "marker": {},
             "nbinsx": 5,
             "nbinsy": 10,
diff --git a/plotly/src/traces/ohlc.rs b/plotly/src/traces/ohlc.rs
index 137be680..cf1b4e50 100644
--- a/plotly/src/traces/ohlc.rs
+++ b/plotly/src/traces/ohlc.rs
@@ -4,7 +4,9 @@ use plotly_derive::FieldSetter;
 use serde::Serialize;
 
 use crate::{
-    common::{Calendar, Dim, Direction, HoverInfo, Label, Line, PlotType, Visible},
+    common::{
+        Calendar, Dim, Direction, HoverInfo, Label, LegendGroupTitle, Line, PlotType, Visible,
+    },
     Trace,
 };
 
@@ -58,6 +60,8 @@ where
     increasing: Option<Direction>,
     #[serde(rename = "legendgroup")]
     legend_group: Option<String>,
+    #[serde(rename = "legendgrouptitle")]
+    legend_group_title: Option<LegendGroupTitle>,
     line: Option<Line>,
     name: Option<String>,
     opacity: Option<f64>,
@@ -129,6 +133,7 @@ mod test {
         .hover_text("1")
         .increasing(Direction::Increasing { line: Line::new() })
         .legend_group("legendgroup")
+        .legend_group_title(LegendGroupTitle::new("Legend Group Title"))
         .line(Line::new())
         .name("ohlc_trace")
         .opacity(0.4)
@@ -152,6 +157,7 @@ mod test {
             "hovertext": "1",
             "increasing": {"line": {}},
             "legendgroup": "legendgroup",
+            "legendgrouptitle": {"text": "Legend Group Title"},
             "line": {},
             "name": "ohlc_trace",
             "opacity": 0.4,
diff --git a/plotly/src/traces/scatter.rs b/plotly/src/traces/scatter.rs
index 09bcebe7..f171602b 100644
--- a/plotly/src/traces/scatter.rs
+++ b/plotly/src/traces/scatter.rs
@@ -10,8 +10,8 @@ use crate::ndarray::ArrayTraces;
 use crate::{
     color::Color,
     common::{
-        Calendar, Dim, ErrorData, Fill, Font, HoverInfo, HoverOn, Label, Line, Marker, Mode,
-        Orientation, PlotType, Position, Visible,
+        Calendar, Dim, ErrorData, Fill, Font, HoverInfo, HoverOn, Label, LegendGroupTitle, Line,
+        Marker, Mode, Orientation, PlotType, Position, Visible,
     },
     private::{NumOrString, NumOrStringCollection},
     Trace,
@@ -73,6 +73,9 @@ where
     /// same time when toggling legend items.
     #[serde(rename = "legendgroup")]
     legend_group: Option<String>,
+    /// Set and style the title to appear for the legend group
+    #[serde(rename = "legendgrouptitle")]
+    legend_group_title: Option<LegendGroupTitle>,
     /// Sets the opacity of the trace.
     opacity: Option<f64>,
     /// Determines the drawing mode for this scatter trace. If the provided `Mode` includes
@@ -417,6 +420,7 @@ mod tests {
             .hover_template_array(vec!["hover_template"])
             .ids(vec!["1"])
             .legend_group("legend_group")
+            .legend_group_title(LegendGroupTitle::new("Legend Group Title"))
             .line(Line::new())
             .marker(Marker::new())
             .meta("meta")
@@ -464,6 +468,7 @@ mod tests {
             "hovertemplate": ["hover_template"],
             "ids": ["1"],
             "legendgroup": "legend_group",
+            "legendgrouptitle": {"text": "Legend Group Title"},
             "line": {},
             "marker": {},
             "meta": "meta",
diff --git a/plotly/src/traces/scatter_polar.rs b/plotly/src/traces/scatter_polar.rs
index 2f5130f2..a406a90e 100644
--- a/plotly/src/traces/scatter_polar.rs
+++ b/plotly/src/traces/scatter_polar.rs
@@ -10,7 +10,8 @@ use crate::ndarray::ArrayTraces;
 use crate::{
     color::Color,
     common::{
-        Dim, Fill, Font, HoverInfo, HoverOn, Label, Line, Marker, Mode, PlotType, Position, Visible,
+        Dim, Fill, Font, HoverInfo, HoverOn, Label, LegendGroupTitle, Line, Marker, Mode, PlotType,
+        Position, Visible,
     },
     private::{NumOrString, NumOrStringCollection},
     Trace,
@@ -55,6 +56,8 @@ where
     /// same time when toggling legend items.
     #[serde(rename = "legendgroup")]
     legend_group: Option<String>,
+    #[serde(rename = "legendgrouptitle")]
+    legend_group_title: Option<LegendGroupTitle>,
     /// Sets the opacity of the trace.
     opacity: Option<f64>,
     /// Determines the drawing mode for this scatter trace. If the provided `Mode` includes
@@ -336,6 +339,7 @@ mod tests {
             .hover_text_array(vec!["hover_text"])
             .ids(vec!["1"])
             .legend_group("legend_group")
+            .legend_group_title(LegendGroupTitle::new("Legend Group Title"))
             .line(Line::new())
             .marker(Marker::new())
             .meta("meta")
@@ -373,6 +377,7 @@ mod tests {
             "hovertemplate": ["hover_template"],
             "ids": ["1"],
             "legendgroup": "legend_group",
+            "legendgrouptitle": {"text": "Legend Group Title"},
             "line": {},
             "marker": {},
             "meta": "meta",
diff --git a/plotly/src/traces/surface.rs b/plotly/src/traces/surface.rs
index d8beb80b..b4110d3b 100644
--- a/plotly/src/traces/surface.rs
+++ b/plotly/src/traces/surface.rs
@@ -5,7 +5,9 @@ use serde::Serialize;
 
 use crate::{
     color::Color,
-    common::{Calendar, ColorBar, ColorScale, Dim, HoverInfo, Label, PlotType, Visible},
+    common::{
+        Calendar, ColorBar, ColorScale, Dim, HoverInfo, Label, LegendGroupTitle, PlotType, Visible,
+    },
     Trace,
 };
 
@@ -147,6 +149,8 @@ where
     hover_text: Option<Dim<String>>,
     #[serde(rename = "legendgroup")]
     legend_group: Option<String>,
+    #[serde(rename = "legendgrouptitle")]
+    legend_group_title: Option<LegendGroupTitle>,
     #[serde(rename = "lightposition")]
     light_position: Option<Position>,
     lighting: Option<Lighting>,
@@ -324,6 +328,7 @@ mod tests {
             .hover_text("hover_text")
             .hover_text_array(vec!["hover_text_1"])
             .legend_group("legend_group")
+            .legend_group_title(LegendGroupTitle::new("Legend Group Title"))
             .lighting(Lighting::new())
             .light_position(Position::new(0, 0, 0))
             .name("surface_trace")
@@ -359,6 +364,7 @@ mod tests {
             "hovertemplate": ["hover_template_1"],
             "hovertext": ["hover_text_1"],
             "legendgroup": "legend_group",
+            "legendgrouptitle": {"text": "Legend Group Title"},
             "lighting": {},
             "lightposition": {"x": 0, "y": 0, "z": 0},
             "name": "surface_trace",