Ugly Betty's Beauty of a Role

America Ferrera joins cast of feature adaptation An Invisible Sign of My Own

America Ferrera's next project is shaping up to be a simple numbers game.

According to the Hollywood Reporter, the Ugly Betty star has signed on to topline the feature adaptation of Aimee Bender's quirky novel An Invisible Sign of My Own, revolving around Mona Gray, a twentysomething loner who found solace in math and geometry as an obsessive-compulsive child after her father fell ill.

Later in life, the loner becomes a math teacher to a group of young children and uses the subject to help her students through crises of their own.

Mad Hot Ballroom helmer Marilyn Adrelo directs the coming-of-age flick.