diff --git a/openlp/core/api/versions/v2/controller.py b/openlp/core/api/versions/v2/controller.py
index 07503009e..f2a4462e1 100644
--- a/openlp/core/api/versions/v2/controller.py
+++ b/openlp/core/api/versions/v2/controller.py
@@ -23,6 +23,7 @@ import logging
 from openlp.core.api.lib import login_required
 from openlp.core.common import ThemeLevel
 from openlp.core.common.registry import Registry
+from openlp.core.lib import image_to_data_uri
 
 from flask import jsonify, request, abort, Blueprint, Response
 
@@ -133,9 +134,14 @@ def get_themes():
     themes = Registry().execute('get_theme_names')
     try:
         for theme in themes[0]:
+            # Gets the background path, get the thumbnail from it, and encode it to a base64 data uri
+            theme_path = Registry().get('theme_manager').theme_path
+            encoded_thumb = image_to_data_uri(theme_path / 'thumbnails' / '{file_name}.png'.format(file_name=theme))
+            # Append the theme to the list
             theme_list.append({
                 'name': theme,
-                'selected': False
+                'selected': False,
+                'thumbnail': encoded_thumb
             })
         for i in theme_list:
             if i["name"] == current_theme:
diff --git a/tests/functional/openlp_core/api/v2/test_controller.py b/tests/functional/openlp_core/api/v2/test_controller.py
index 3b0c07fb0..64c3a27f4 100644
--- a/tests/functional/openlp_core/api/v2/test_controller.py
+++ b/tests/functional/openlp_core/api/v2/test_controller.py
@@ -18,9 +18,10 @@
 # You should have received a copy of the GNU General Public License      #
 # along with this program.  If not, see <https://www.gnu.org/licenses/>. #
 ##########################################################################
-from unittest.mock import MagicMock
+from unittest.mock import MagicMock, patch
 
 from openlp.core.common.registry import Registry
+from pathlib import Path
 
 
 def test_retrieve_live_item(flask_client, settings):
@@ -150,16 +151,21 @@ def test_controller_get_themes_retrieves_themes_list(flask_client, settings):
     assert type(res) is list
 
 
-def test_controller_get_themes_retrieves_themes_list_service(flask_client, settings):
+@patch('openlp.core.api.versions.v2.controller.image_to_data_uri')
+def test_controller_get_themes_retrieves_themes_list_service(mocked_image_to_data_uri, flask_client, settings):
     settings.setValue('themes/theme level', 2)
+    mocked_theme_manager = MagicMock()
+    mocked_theme_manager.theme_path = Path()
     mocked_service_manager = MagicMock()
     mocked_service_manager.service_theme = 'test_theme'
-    Registry().register('theme_manager', MagicMock())
+    Registry().register('theme_manager', mocked_theme_manager)
     Registry().register('service_manager', mocked_service_manager)
     Registry().register_function('get_theme_names', MagicMock(side_effect=[['theme1', 'test_theme', 'theme2']]))
+    mocked_image_to_data_uri.return_value = ''
     res = flask_client.get('api/v2/controller/themes').get_json()
-    assert res == [{'name': 'theme1', 'selected': False}, {'name': 'test_theme', 'selected': True},
-                   {'name': 'theme2', 'selected': False}]
+    assert res == [{'thumbnail': '', 'name': 'theme1', 'selected': False},
+                   {'thumbnail': '', 'name': 'test_theme', 'selected': True},
+                   {'thumbnail': '', 'name': 'theme2', 'selected': False}]
 
 
 def test_controller_get_theme_data(flask_client, settings):