We know it's no fun to have surprises spoiled, but this is too good to ignore. Oscar winner Jennifer Lawrence has joined the cast of 'Dumb and Dumber To' for a small role, and we couldn't be happier for her, because Lawrence has revealed herself to be a 'Dumb and Dumber' super-fan.

This news comes from The Hollywood Reporter, who note that it was meant to be a secret, and that she'll be playing Kathleen Turner's character in a flashback. We'd feel bad about spoiling this if it didn't allow us to re-post a video of Lawrence reciting dialogue from the first film word for word. Lawrence reveals in the clip that she has three films totally memorized: ‘Dumb and Dumber,’ ‘Anchorman‘ and ‘Step Brothers.’ This suggests she can also perform the rap song "Boats and Hoes" from the latter.

Lawrence joins original cast members Jim Carrey and recent Emmy Winner Jeff Daniels, alongside new recruits Rob Riggle, Kathleen Turner, Rachel Melvin, and Laurie Holden. The film is currently shooting, and we should see it from Universal sometime next year, though the film currently doesn't have a release date. But check out this video of Jennifer Lawrence below, and wonder who's happier about this cameo.