Seth MacFarlane's Next Film: 'Every Line Is Hilarious,' Amanda Seyfried Swears

Seyfried tells MTV News that she cannot stop laughing while shooting 'A Million Ways to Die in the West.'

Any movie with a cast that includes Charlize Theron, Liam Neeson, Amanda Seyfried, Sarah Silverman, Giovanni Ribisi and Neil Patrick Harris is probably worth seeing. Add writer/producer/director/actor/singer/awards show host Seth MacFarlane, plus the production team behind his 2012 hit "Ted," and you've got a potential masterpiece.

"A Million Ways to Die in the West" is a comedy Western directed and co-written by MacFarlane (who also stars as Albert, a cowardly sheep farmer trying to win back his lost love). It's currently shooting and scheduled for release on May 30, 2014.

While promoting the animated film "Epic," Seyfried told MTV News about the fun she's been having on the "A Million Ways" set, with MacFarlane at the helm.

"Everybody's laughing all the time," she said. "It's like nobody cares about the fact that they've been shooting a 14-hour day. Every line is hilarious."

Seyfried, who plays Albert's ex-girlfriend, praised MacFarlane's ability to handle his duties as both director and lead actor. "It's amazing, he looks like a movie star," she said. "He's very focused on what he needs to do and he watches the takes, but then all of a sudden he's next to you in the scene, and you're like, uh, are you watching what I'm doing, or...? And then he yells cut when he's in the scene."

Seyfried is also thrilled with her other castmates — especially Harris, her partner in the film. "I couldn't imagine anyone better," she said. "I really love this movie. It's going to be amazing!"