Smile, Darn Ya, Smile! is a 1931 Warner Bros. Merrie Melodies cartoon short directed by Rudolf Ising. The short was released on September 5, 1931, and features Foxy, an early Merrie Melodies star.

This is one of only three Merrie Melodies cartoons to star Foxy; the other two are Lady, Play Your Mandolin! (August 1931) and One More Time (October 3, 1931). This short is a remake of Trolley Troubles, a Disney short featuring Oswald the Lucky Rabbit in whose creation Harman had once been involved.

For the first time in a Warner Bros. cartoon, the short uses a gag, suggested by Bob Clampett, that has characters from the trolley's parody advertising posters (Smith Brothers and others) come to life and perform a bit of business. This type of gag would become a recurring element across Merrie Melodies.

A segment of the cartoon was featured in "The Gang's All Here", the twelfth episode of the 1980s children's series Pee-wee's Playhouse.