Caspar and Joe will be voicing characters in the film
JOE AND I ARE IN THE NEW SPONGEBOB MOVIE
— Caspar Lee (@Caspar_Lee) February 20, 2015
Set to be released in cinemas 27 March, the YouTubers will be voicing two seagulls; Kyle and Number Two Seagull.
Paramount Pictures have released a video featuring interviews with Joe and Caspar, including footage of them recording lines for the film.
Joe has also recently announced the release of a graphic novel.