diff --git a/elasticsearch_dsl/search_base.py b/elasticsearch_dsl/search_base.py
index 5680778c..7a940d4a 100644
--- a/elasticsearch_dsl/search_base.py
+++ b/elasticsearch_dsl/search_base.py
@@ -743,7 +743,7 @@ def highlight(self, *fields, **kwargs):
             s._highlight[f] = kwargs
         return s
 
-    def suggest(self, name, text, **kwargs):
+    def suggest(self, name, text=None, regex=None, **kwargs):
         """
         Add a suggestions request to the search.
 
@@ -754,9 +754,27 @@ def suggest(self, name, text, **kwargs):
 
             s = Search()
             s = s.suggest('suggestion-1', 'Elasticsearch', term={'field': 'body'})
+
+        # regex query for Completion Suggester
+            s = Search()
+            s = s.suggest('suggestion-1', regex='py[thon|py]', completion={'field': 'body'})
         """
+        if text is None and regex is None:
+            raise ValueError('You have to pass "text" or "regex" argument.')
+        if text and regex:
+            raise ValueError('You can only pass either "text" or "regex" argument.')
+        if regex and "completion" not in kwargs:
+            raise ValueError(
+                '"regex" argument must be passed with "completion" keyword argument.'
+            )
+
         s = self._clone()
-        s._suggest[name] = {"text": text}
+        if regex:
+            s._suggest[name] = {"regex": regex}
+        elif "completion" in kwargs:
+            s._suggest[name] = {"prefix": text}
+        else:
+            s._suggest[name] = {"text": text}
         s._suggest[name].update(kwargs)
         return s
 
diff --git a/tests/_async/test_search.py b/tests/_async/test_search.py
index 1fc1ac98..6aedb0ed 100644
--- a/tests/_async/test_search.py
+++ b/tests/_async/test_search.py
@@ -718,3 +718,43 @@ async def test_empty_search():
     assert [hit async for hit in s] == []
     assert [hit async for hit in s.scan()] == []
     await s.delete()  # should not error
+
+
+def test_suggest_completion():
+    s = AsyncSearch()
+    s = s.suggest("my_suggestion", "pyhton", completion={"field": "title"})
+
+    assert {
+        "suggest": {
+            "my_suggestion": {"completion": {"field": "title"}, "prefix": "pyhton"}
+        }
+    } == s.to_dict()
+
+
+def test_suggest_regex_query():
+    s = AsyncSearch()
+    s = s.suggest("my_suggestion", regex="py[thon|py]", completion={"field": "title"})
+
+    assert {
+        "suggest": {
+            "my_suggestion": {"completion": {"field": "title"}, "regex": "py[thon|py]"}
+        }
+    } == s.to_dict()
+
+
+def test_suggest_must_pass_text_or_regex():
+    s = AsyncSearch()
+    with raises(ValueError):
+        s.suggest("my_suggestion")
+
+
+def test_suggest_can_only_pass_text_or_regex():
+    s = AsyncSearch()
+    with raises(ValueError):
+        s.suggest("my_suggestion", text="python", regex="py[hton|py]")
+
+
+def test_suggest_regex_must_be_wtih_completion():
+    s = AsyncSearch()
+    with raises(ValueError):
+        s.suggest("my_suggestion", regex="py[thon|py]")
diff --git a/tests/_sync/test_search.py b/tests/_sync/test_search.py
index 9a32ee13..dcf0fe6f 100644
--- a/tests/_sync/test_search.py
+++ b/tests/_sync/test_search.py
@@ -716,3 +716,43 @@ def test_empty_search():
     assert [hit for hit in s] == []
     assert [hit for hit in s.scan()] == []
     s.delete()  # should not error
+
+
+def test_suggest_completion():
+    s = Search()
+    s = s.suggest("my_suggestion", "pyhton", completion={"field": "title"})
+
+    assert {
+        "suggest": {
+            "my_suggestion": {"completion": {"field": "title"}, "prefix": "pyhton"}
+        }
+    } == s.to_dict()
+
+
+def test_suggest_regex_query():
+    s = Search()
+    s = s.suggest("my_suggestion", regex="py[thon|py]", completion={"field": "title"})
+
+    assert {
+        "suggest": {
+            "my_suggestion": {"completion": {"field": "title"}, "regex": "py[thon|py]"}
+        }
+    } == s.to_dict()
+
+
+def test_suggest_must_pass_text_or_regex():
+    s = Search()
+    with raises(ValueError):
+        s.suggest("my_suggestion")
+
+
+def test_suggest_can_only_pass_text_or_regex():
+    s = Search()
+    with raises(ValueError):
+        s.suggest("my_suggestion", text="python", regex="py[hton|py]")
+
+
+def test_suggest_regex_must_be_wtih_completion():
+    s = Search()
+    with raises(ValueError):
+        s.suggest("my_suggestion", regex="py[thon|py]")