 Elizabeth <unk> " Tina " Fey ( / <unk> / ; born May 18 , 1970 ) is an American actress , comedian , writer , and producer . She is best known for her work on the NBC sketch comedy series Saturday Night Live ( 1998 @-@ 2006 ) , for her impression of former Alaska Governor and 2008 Vice @-@ Presidential candidate Sarah Palin , and for creating acclaimed series 30 Rock ( 2006 – 2013 ) and Unbreakable Kimmy Schmidt ( 2015 – present ) . She is also well known for appearing in films such as Mean Girls ( 2004 ) , Baby Mama ( 2008 ) , Date Night ( 2010 ) , <unk> Most Wanted ( 2014 ) , and Sisters ( 2015 ) . 
