Book Of Mormon star Josh Gad and Ryan Dixon are now set to script the treatment for Triplets, the Twins sequel that will be produced by Montecito for Universal Pictures, Deadline said.

Dixon will write the script. The film has Arnold Schwarzenegger and Danny DeVito attached to reprise their roles as the mismatched siblings, and Eddie Murphy is attached to play the third brother. Ivan Reitman, who directed the first one, is producing.

Gad is an exec producer and star of the NBC comedy 1600 Penn, which premieres in January, and he’s also starring in Thanks For Sharing opposite Tim Robbins and Mark Ruffalo, which made its debut at Sundance. Gad is repped by ICM, Brillstein and attorney PJ Shapiro. Dixon is also repped by ICM Partners.