VIDEO: Susan Sarandon Talks Favorite Moments from New Comedy TAMMY on GMA

Oscar winner Susan Sarandon stopped by this morning's GMA to talk about "cankles" and dishes about her new role as Melissa McCarthy's grandma in the comedy TAMMY, now in theaters. Check out the appearance below!

Directed by Ben Falcone, the cast also includes Susan Sarandon, Allison Janney, Gary Cole, Mark Duplass, Toni Collette, Nat Faxon, Dan Aykroyd and Kathy Bates.

In the film, Tammy (Melissa McCarthy) is having a bad day. She's totaled her clunker car, gotten fired from her thankless job at a greasy burger joint, and instead of finding comfort at home, finds her husband getting comfortable with the neighbor in her own house. It's time to take her boom box and book it.

The bad news is she's broke and without wheels. The worse news is her grandma, Pearl (Susan Sarandon), is her only option-with a car, cash, and an itch to see Niagara Falls. Not exactly the escape Tammy had in mind. But on the road, with grandma riding shot gun, it may be just what Tammy needs.