Anna Kendrick and Sam Rockwell Talk 'Mr. Right'

— -- They say a good man is hard to find, and in the new movie, "Mr. Right," Anna Kendrick thinks she's found one. Until, she learns of his terrible secret.

Kendrick, who plays Martha, finds out that her new beau Francis (Sam Rockwell) is a professional hit man who kills the people who hire him instead of the intended targets.

The actors stopped by “Good Morning America” today to promote the action romance.

“I thought, I love this girl,” Kendrick said of reading the movie script. “She is a psycho. She’s an absolute psycho from page one and then Sam puts a gun in her hand and it’s absolute chaos.”

In the film, Rockwell turns on the charm as a dancing assassin.

“A dancing, killing machine,” he said, adding that he’s not a trained dancer.

"Mr. Right" opens April 8 in theaters and on-demand.