diff --git a/SDWebImage/SDWebImageManager.h b/SDWebImage/SDWebImageManager.h
index cce427d..5240e15 100644
--- a/SDWebImage/SDWebImageManager.h
+++ b/SDWebImage/SDWebImageManager.h
@@ -190,6 +190,7 @@ SDWebImageManager *manager = [SDWebImageManager sharedManager];
 /**
  * Check if image has already been cached
  */
+- (BOOL)cachedImageExistsForURL:(NSURL *)url;
 - (BOOL)diskImageExistsForURL:(NSURL *)url;
 
 @end
diff --git a/SDWebImage/SDWebImageManager.m b/SDWebImage/SDWebImageManager.m
index 312b3e7..c28a619 100644
--- a/SDWebImage/SDWebImageManager.m
+++ b/SDWebImage/SDWebImageManager.m
@@ -60,6 +60,12 @@
     }
 }
 
+- (BOOL)cachedImageExistsForURL:(NSURL *)url {
+    NSString *key = [self cacheKeyForURL:url];
+    if ([self.imageCache imageFromMemoryCacheForKey:key] != nil) return YES;
+    return [self.imageCache diskImageExistsWithKey:key];
+}
+
 - (BOOL)diskImageExistsForURL:(NSURL *)url {
     NSString *key = [self cacheKeyForURL:url];
     return [self.imageCache diskImageExistsWithKey:key];