Bianca Santos is heading back to high school…

The Cuban- and Brazilian-American actress has joined the cast of CBS Films’ upcoming teen comedy The DUFF, which will also star Bella Thorne.

Directed by Ari Sandel, the film is an adaptation of the Kody Keplinger’s young adult novel The DUFF: (Designated Ugly Fat Friend).

Mae Whitman stars in the comedy about contented high schooler named Bianca, whose world is shattered when she discovers the student body knows her as ‘The Duff’ (Designated Ugly Fat Friend). She reinvents herself, setting out to overthrow the school’s reigning queen bee.

Santos,who starred on the first season ofABC Family’s The Fosters, will portray one of Bianca’s more popular friends.

Thorne will star as Bianca’s ruthless rival Madison.

Ken Jeong is set to play her favorite teacher, with Nick Eversman playing Bianca’s crush and Robbie Amell as a slick and charming jock she enlists for her grand scheme.

Josh Cagan adapted the script from Keplinger’s novel.