diff --git a/litellm/llms/vertex_ai.py b/litellm/llms/vertex_ai.py
index 6752b3cb30..1cda0ccdba 100644
--- a/litellm/llms/vertex_ai.py
+++ b/litellm/llms/vertex_ai.py
@@ -227,14 +227,21 @@ def _gemini_vision_convert_messages(messages: list):
                 processed_images.append(google_clooud_part)
             elif "base64" in img:
                 # Case 4: Images with base64 encoding
-                import base64
+                import base64, re
 
                 # base 64 is passed as data:image/jpeg;base64,<base-64-encoded-image>
-                img_without_base_64 = img.split(",")[1]
+                image_metadata, img_without_base_64 = img.split(",")
+
+                # read mime_type from img_without_base_64=data:image/jpeg;base64
+                # Extract MIME type using regular expression
+                mime_type_match = re.match(r"data:(.*?);base64", image_metadata)
+
+                if mime_type_match:
+                    mime_type = mime_type_match.group(1)
+                else:
+                    mime_type = "image/jpeg"
                 decoded_img = base64.b64decode(img_without_base_64)
-                processed_image = Part.from_data(
-                    data=decoded_img, mime_type="image/jpeg"
-                )
+                processed_image = Part.from_data(data=decoded_img, mime_type=mime_type)
                 processed_images.append(processed_image)
         return prompt, processed_images
     except Exception as e: