Joan Cusack has stepped up to replace Allison Janney in new U.S. drama series Shameless - after The West Wing star quit her role.
Janney starred in the Showtime series pilot as a mum coping with her sexually active daughter, but she quit the production to take a lighter role in upcoming TV comedy Mr. Sunshine.
And now Cusack has signed on to fill the spot, just weeks before production is set to begin, reports Variety.
Cusack will star with Emmy Rossum and William H. MACy in the new series, scheduled to broadcast on 9 January (11).