Washington, Feb. 15 -- Oscar nominee Andra Day has joined the cast of Bradley Cooper's next film 'Is This Thing On?'. Cooper is directing the Searchlight movie, which also stars Will Arnett, Sean Hayes and Laura Dern. Cooper will play a supporting role.

Written by Arnett and Mark Chappell, 'Is This Thing On?' follows Alex (Arnett), a man facing middle age and an impending divorce. "As their marriage quietly unravels," the official longline explains, "Alex seeks new purpose in the New York comedy scene while Tess (Dern) confronts the sacrifices she made for their family -- forcing them to navigate co-parenting, identity, and whether love can take a new form," reported Variety.

Singer-songwriter Andra made her acting debut in Lee Daniels'...