It's Niagara Falls or bust for Melissa McCarthy and Susan Sarandon in a new international trailer for the summer comedy Tammy. McCarthy stars as the title character, a woman who has nothing but drama in her life. After her car breaks down on the day she finds out her husband is cheating on her, she decides to rob a fast food joint and hit the road with her alcoholic grandmother. Will Tammy's problems fade into the sunset? Or is she just causing more grief for herself and everyone around her? Watch new footage from this Ben Falcone directed comedy, which he helmed from a script co-written with his wife Melissa McCarthy. In theaters soon.