Ana Gasteyer Ana Gasteyer

Grease: Live just added someone with serious comedy chops to its cast: Saturday Night Live graduate Ana Gasteyer. She's been cast as Principal McGee, Deadline reports - the stern but (occasionally) fun-loving ruler of Rydell High in the live adaptation of the classic musical airing next year.

Fox announces live Grease event

Gasteyer, immortalized in SNL history through her impersonations, including Martha Stewart, as well as her infamous NPR "Muffin Top" sketch with Betty White, joins a cast that includes Vanessa Hudgens (Rizzo), Keke Palmer (Marty), Mario Lopez (Vince Fontaine) and Carly Rae Jepsen (Pink Lady Frenchy).

Grease: Live airs Sunday, Jan. 31 at 7 on Fox.