The 'Saturday Night Live' veteran will guest star as Nancy, a single mom and "incompetent" associate producer on Ava's talk show. Hopefully that means Shannon and Maya Rudolph will have plenty of scenes together.
According to TV Guide, Shannon makes her debut on the Nov. 23 episode. Her role could become recurring.
Shannon will pop on 'The Middle' as Frankie Heck's sister and recently appeared as a co-host on 'The Talk.'
In other casting news ...
Angus MacFadyen will help end 'Chuck.' The 'Braveheart' actor will appear in the final four episodes as an ex-CIA operative who now runs a mercenary spy ring. [TVLine]
Dorian Missick joins 'Southland.' 'The Cape' alum joins TNT's drama for its fourth season as Ruben Robinson, a new partner for Det. Lydia Adams, played by Regina King. [Deadline]
Michelle Hurd has a new zip code. 'The Glades' actress will recur on '90210' as an event planner who approaches one of the main girls with a fashion show. [EW]