Search: Is Lawrence back with her
The actress spent one day on the set of "Dumb and Dumber To" in Atlanta to film her guest role, according to The Hollywood Reporter.
She is said to be playing a younger version of Kathleen Turner's character Fraida Feltcher, a former love interest for the hapless duo played by Jim Carrey and Jeff Daniels.
Lawrence, who is working nearby on upcoming blockbuster "The Hunger Games: Mockingjay," previously admitted she is a huge fan of the original comedy.
She told talk show host Jimmy Fallon,"I know every word to 'Dumb and Dumber,' 'Step Brothers' and 'Anchorman'," before reciting lines from the hit 1994 film.