Harpo Marx appeared as himself on a 1955 episode of "I Love Lucy" in which first, he performed "Take Me Out to the Ball Game" on his harp, then, he and Lucille Ball reprised the mirror routine from "Duck Soup", with Lucy dressed up as Harpo. Lucy had worked with the Marxes when she appeared in a supporting role in an earlier Marx Brothers film, "Room Service". Chico once appeared on "I've Got a Secret" dressed up as Harpo; his secret was shown in a caption reading, "I'm pretending to be Harpo Marx (I'm Chico)".