The casting news for the comedy pilot, starring and co-created by YouTube personality Bloom, has been released as a short video on Bloom's YouTube page.

Bloom will be joined by Fontana, Michael McDonald, Champlin and Rodriguez III as series regulars. The half-hour comedy, with musical elements, will begin production in Los Angeles and West Covina in October.

Marc Webb ("500 Days of Summer," "The Amazing Spider-Man" films) will direct and executive produce "Crazy Ex-Girlfriend."

The project, according to press notes, "centers around Rebecca (Bloom), a successful, driven, and possibly crazy young woman who impulsively gives up everything – her partnership at a prestigious law firm and her upscale apartment in Manhattan – in a desperate attempt to find love and happiness in that exotic hotbed of romance and adventure: West Covina, California. The cast includes Tony nominee and recent film voice-over star Fontana ('Frozen') who will play Greg, a bartender and Rebecca's (Bloom) first friend; actor and comedian McDonald (MADtv) is Darryl, Rebecca's new boss; Obie and Drama Desk Award winner Champlin (Broadway productions of Billy Elliot, Sweeney Todd) plays Paula, her co-worker at the law firm who is suspicious of Rebecca; and Broadway star Rodriguez III (Here Lies Love) will play Josh, Rebecca's childhood boyfriend who she serendipitously runs into years later, and who acts as the catalyst for her dramatic life change."

Produced by CBS Television Studios, the pilot is executive-produced by feature writer Aline Brosh McKenna ("The Devil Wears Prada," "Annie") and Bloom.