diff --git a/parsons/hustle/hustle.py b/parsons/hustle/hustle.py
index b1153a5e86..1d07bc3831 100644
--- a/parsons/hustle/hustle.py
+++ b/parsons/hustle/hustle.py
@@ -277,9 +277,26 @@ def get_group(self, group_id):
         logger.info(f"Got {group_id} group.")
         return r
 
+    def create_group_membership(self, group_id, lead_id):
+        """
+        Add a lead to a group.
+
+        `Args:`
+            group_id: str
+                The group id.
+            lead_id: str
+                The lead id.
+        """
+
+        return self._request(
+            f"groups/{group_id}/memberships",
+            req_type="POST",
+            payload={"leadId": lead_id},
+        )
+
     def get_lead(self, lead_id):
         """
-        Get a single lead..
+        Get a single lead.
 
         `Args`:
             lead_id: str
diff --git a/test/test_hustle/test_hustle.py b/test/test_hustle/test_hustle.py
index fddef221f4..22393661a0 100644
--- a/test/test_hustle/test_hustle.py
+++ b/test/test_hustle/test_hustle.py
@@ -12,48 +12,41 @@
 class TestHustle(unittest.TestCase):
     @requests_mock.Mocker()
     def setUp(self, m):
-
         m.post(HUSTLE_URI + "oauth/token", json=expected_json.auth_token)
         self.hustle = Hustle(CLIENT_ID, CLIENT_SECRET)
 
     @requests_mock.Mocker()
     def test_auth_token(self, m):
-
         self.assertEqual(
             self.hustle.auth_token, expected_json.auth_token["access_token"]
         )
 
     @requests_mock.Mocker()
     def test_get_organizations(self, m):
-
         m.get(HUSTLE_URI + "organizations", json=expected_json.organizations)
         orgs = self.hustle.get_organizations()
         assert_matching_tables(orgs, Table(expected_json.organizations["items"]))
 
     @requests_mock.Mocker()
     def test_get_organization(self, m):
-
         m.get(HUSTLE_URI + "organizations/LePEoKzD3", json=expected_json.organization)
         org = self.hustle.get_organization("LePEoKzD3")
         self.assertEqual(org, expected_json.organization)
 
     @requests_mock.Mocker()
     def test_get_groups(self, m):
-
         m.get(HUSTLE_URI + "organizations/LePEoKzD3/groups", json=expected_json.groups)
         groups = self.hustle.get_groups("LePEoKzD3")
         assert_matching_tables(groups, Table(expected_json.groups["items"]))
 
     @requests_mock.Mocker()
     def test_get_group(self, m):
-
         m.get(HUSTLE_URI + "groups/zajXdqtzRt", json=expected_json.group)
         org = self.hustle.get_group("zajXdqtzRt")
         self.assertEqual(org, expected_json.group)
 
     @requests_mock.Mocker()
     def test_create_lead(self, m):
-
         m.post(HUSTLE_URI + "groups/cMCH0hxwGt/leads", json=expected_json.lead)
         lead = self.hustle.create_lead(
             "cMCH0hxwGt", "Barack", "5126993336", last_name="Obama"
@@ -62,7 +55,6 @@ def test_create_lead(self, m):
 
     @requests_mock.Mocker()
     def test_create_leads(self, m):
-
         m.post(
             HUSTLE_URI + "groups/cMCH0hxwGt/leads",
             [
@@ -83,14 +75,12 @@ def test_create_leads(self, m):
 
     @requests_mock.Mocker()
     def test_update_lead(self, m):
-
         m.put(HUSTLE_URI + "leads/wqy78hlz2T", json=expected_json.updated_lead)
         updated_lead = self.hustle.update_lead("wqy78hlz2T", first_name="Bob")
         self.assertEqual(updated_lead, expected_json.updated_lead)
 
     @requests_mock.Mocker()
     def test_get_leads(self, m):
-
         # By Organization
         m.get(HUSTLE_URI + "organizations/cMCH0hxwGt/leads", json=expected_json.leads)
         leads = self.hustle.get_leads(organization_id="cMCH0hxwGt")
@@ -103,42 +93,36 @@ def test_get_leads(self, m):
 
     @requests_mock.Mocker()
     def test_get_lead(self, m):
-
         m.get(HUSTLE_URI + "leads/wqy78hlz2T", json=expected_json.lead)
         lead = self.hustle.get_lead("wqy78hlz2T")
         self.assertEqual(lead, expected_json.lead)
 
     @requests_mock.Mocker()
     def test_get_tags(self, m):
-
         m.get(HUSTLE_URI + "organizations/LePEoKzD3/tags", json=expected_json.tags)
         tags = self.hustle.get_tags(organization_id="LePEoKzD3")
         assert_matching_tables(tags, Table(expected_json.tags["items"]))
 
     @requests_mock.Mocker()
     def test_get_tag(self, m):
-
         m.get(HUSTLE_URI + "tags/zEx5rjbg5", json=expected_json.tag)
         tag = self.hustle.get_tag("zEx5rjbg5")
         self.assertEqual(tag, expected_json.tag)
 
     @requests_mock.Mocker()
     def test_get_agents(self, m):
-
         m.get(HUSTLE_URI + "groups/Qqp6o90SiE/agents", json=expected_json.agents)
         agents = self.hustle.get_agents(group_id="Qqp6o90SiE")
         assert_matching_tables(agents, Table(expected_json.agents["items"]))
 
     @requests_mock.Mocker()
     def test_get_agent(self, m):
-
         m.get(HUSTLE_URI + "agents/CrJUBI1CF", json=expected_json.agent)
         agent = self.hustle.get_agent("CrJUBI1CF")
         self.assertEqual(agent, expected_json.agent)
 
     @requests_mock.Mocker()
     def test_create_agent(self, m):
-
         m.post(HUSTLE_URI + "groups/Qqp6o90Si/agents", json=expected_json.agent)
         new_agent = self.hustle.create_agent(
             "Qqp6o90Si", name="Angela", full_name="Jones", phone_number="12032498764"
@@ -147,9 +131,16 @@ def test_create_agent(self, m):
 
     @requests_mock.Mocker()
     def test_update_agent(self, m):
-
         m.put(HUSTLE_URI + "agents/CrJUBI1CF", json=expected_json.agent)
         updated_agent = self.hustle.update_agent(
             "CrJUBI1CF", name="Angela", full_name="Jones"
         )
         self.assertEqual(updated_agent, expected_json.agent)
+
+    @requests_mock.Mocker()
+    def test_create_group_membership(self, m):
+        m.post(HUSTLE_URI + "groups/zajXdqtzRt/memberships", json=expected_json.group)
+        group_membership = self.hustle.create_group_membership(
+            "zajXdqtzRt", "A6ebDlAtqB"
+        )
+        self.assertEqual(group_membership, expected_json.group)