Rosenthal is an identity assumed by Kermit the Frog in The Great Muppet Caper. Kermit poses as Miss Piggy's attorney, as a means of visiting her in prison. Clad in a gray suit, wig, and moustache, he explains the plan to capture Nicky Holiday and his gang and prove Piggy's innocence. When Miss Piggy utters a heartfelt "I love you, Rosenthal!", the pair kiss through the bars. Piggy ends up with Rosenthal's moustache, and Kermit has mesh marks on his face.