Bride of the Gorilla, written and directed by Curt Siodmak. Apes, girls, what's not to love? Steve Calvert played the gorilla, but he only appeared toward the end so he didn't get a credit. A production note on Wikipedia says "Edward G. Robinson Jr. was originally cast for the movie but was fired by the producers after his arrest for writing a bad check for $138 to the Laguna Beach Garage." Lucky him. Raymond Burr and Lon Chaney Jr. also starred. And notice, I managed to avoid any "second banana" jokes!
Comic book reader version: Download Bride of the Gorilla Pressbook
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