Kristen Stewart Can't Stop Smiling on 'The Tonight Show'

Kristen Stewart lets out a big smile while sitting down for an interview on The Tonight Show Starring Jimmy Fallon on Tuesday evening (August 11) in New York City.

The 25-year-old actress is on the program to promote her upcoming movie American Ultra, in theaters later this month.

PHOTOS: Check out the latest pics of Kristen Stewart

Kristen had some fun with Jimmy during the appearance and played a game of “word blurt.” Watch the video below!

FYI: Kristen is wearing a DVF romper.