Batman made his first appearance in Detective Comics No. 27 in May 1939. In the Spring of the following year, Batman No. 1, featuring the first appearances of The Joker and Catwoman appeared on newsstands. The Joker was created by Kane's assistant Jerry Robinson and Bill Finger supplied the look with a photo of actor Conrad Veidt in the movie The Man Who Laughs. The Penquin didn't appear until December 1941 in Detective Comics No. 58."