Tina Fey didn't know she worked with 'Mean Girls' star on '30 Rock'

Tina Fey says that casting Gretchen Wieners in the new 'Mean Girls' movie musical was a tough task – and she ended up choosing an actress she'd worked with on '30 Rock' without realizing it.

Tina Fey Has the Perfect Idea For Bringing Back '30 Rock' -- and 'Parks & Rec'! (Exclusive)

Tina Fey's Instagram, Twitter & Facebook on IDCrawl

Tina Fey on Ending 30 Rock and Liz Lemon's Future

Tina Fey didn't know she worked with 'Mean Girls' star on '30 Rock'

30 Rock: 10 Projects The Cast Worked On Together Outside The Show

Mean Girls Sings, Dances, Insults, and Backstabs Its Way to Broadway

Here's What The Cast Of 30 Rock Looks Like Today

Tina Fey Calls For Blackface Episodes Of 30 Rock To Be 'Taken Out Of Circulation' - Fans React! - Perez Hilton

30 Rock” survives, thrives under Fey's sharp eye – The Denver Post

The Untold Truth Of Tina Fey

The Tina Fey effect: how the original Mean Girl made comedy smarter

Lindsay Lohan, Reneé Rapp and the stars of the new 'Mean Girls' turn out for premiere, Highlands Sun

Lohan, Rapp and stars of new 'Mean Girls' turn out for premiere — Naharnet