is she an actress too?
Yes.
Tina Fey
In 2002, Fey appeared in the surreal comedy "Martin & Orloff". She made her debut as writer and co-star of the 2004 teen comedy "Mean Girls". 
why is it called tgs on 30 rock It was originally called "The Girlie Show". who created this series? Tina Fey how many seasons does this series have? Seven when was this first aired? October 11, 2006 and where? NBC who were the main cast? Alec Baldwin, Tracy Morgan, Jane Krakowski, Jack McBrayer and Scott Adsit, to name a few. where is the above mentioned creator from? Delaware County, Pennsylvania does she participate in any social activities? Her charity work includes support of "Autism Speaks". Her charity work includes support of Autism Speaks which are some of her other works? She also was a writer for "Saturday Night Live". does she have any other occupation other then creating and writing plays or series? She provided her voice for the pinball game "Medieval Madness".
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Tina Fey [SEP] Feature films
In 2002, Fey appeared in the surreal comedy "Martin & Orloff". She made her debut as writer and co-star of the 2004 teen comedy "Mean Girls". Characters and behaviors in the film are based on Fey's high school life at Upper Darby High School and on the non-fiction book "Queen Bees and Wannabes" by Rosalind Wiseman. The cast includes other past cast members of "SNL" including Tim Meadows, Ana Gasteyer, and Amy Poehler. The film received favorable reviews, and was a box office success, grossing US$129 million worldwide. In a 2004 interview, Fey expressed that she would like to write and direct films.