diff --git a/changelogs/fragments/4719-fix-keycloak-realm.yaml b/changelogs/fragments/4719-fix-keycloak-realm.yaml
new file mode 100644
index 0000000000..3071756ec5
--- /dev/null
+++ b/changelogs/fragments/4719-fix-keycloak-realm.yaml
@@ -0,0 +1,2 @@
+bugfixes:
+  - "keycloak_realm - fix default groups and roles (https://github.com/ansible-collections/community.general/issues/4241)."
\ No newline at end of file
diff --git a/plugins/modules/identity/keycloak/keycloak_realm.py b/plugins/modules/identity/keycloak/keycloak_realm.py
index 90b8d62a56..fd9f17ebf8 100644
--- a/plugins/modules/identity/keycloak/keycloak_realm.py
+++ b/plugins/modules/identity/keycloak/keycloak_realm.py
@@ -163,7 +163,7 @@ options:
         aliases:
             - defaultGroups
         type: list
-        elements: dict
+        elements: str
     default_locale:
         description:
             - The realm default locale.
@@ -183,7 +183,7 @@ options:
         aliases:
             - defaultRoles
         type: list
-        elements: dict
+        elements: str
     default_signature_algorithm:
         description:
             - The realm default signature algorithm.
@@ -622,10 +622,10 @@ def main():
         client_authentication_flow=dict(type='str', aliases=['clientAuthenticationFlow']),
         client_scope_mappings=dict(type='dict', aliases=['clientScopeMappings']),
         default_default_client_scopes=dict(type='list', elements='str', aliases=['defaultDefaultClientScopes']),
-        default_groups=dict(type='list', elements='dict', aliases=['defaultGroups']),
+        default_groups=dict(type='list', elements='str', aliases=['defaultGroups']),
         default_locale=dict(type='str', aliases=['defaultLocale']),
         default_optional_client_scopes=dict(type='list', elements='str', aliases=['defaultOptionalClientScopes']),
-        default_roles=dict(type='list', elements='dict', aliases=['defaultRoles']),
+        default_roles=dict(type='list', elements='str', aliases=['defaultRoles']),
         default_signature_algorithm=dict(type='str', aliases=['defaultSignatureAlgorithm']),
         direct_grant_flow=dict(type='str', aliases=['directGrantFlow']),
         display_name=dict(type='str', aliases=['displayName']),