SNL Alum Molly Shannon Lands in The Middle

Molly Shannon has signed on to appear on ABC's The Middle, TVLine.com reports.

The Saturday Night Livealum, who recently appeared on Gleeand the Cameron Diaz comedy Bad Teacher, will play the never-before-seen sister of Frankie (Patricia Heaton).

Is The Middle on your Watchlist? Add it and your other favorites now and never miss an episode

As previously announced, Heaton's former on-screen hubby, Ray Romano, will appear in the Wednesday, Sept. 21 premiere (8/7c on ABC).