<Tr> <Td> J.D. Lutz </Td> <Td> John Lutz </Td> <Td_colspan="3"> Recurring </Td> <Td_colspan="4"> Main </Td> </Tr> <P> Elizabeth Miervaldis "Liz" Lemon (Tina Fey), the series' protagonist, is head writer of TGS with Tracy Jordan . Jack Donaghy calls her a "New York third - wave feminist, college - educated, single - and - pretending - to - be-happy - about - it, over-scheduled, undersexed, you buy any magazine that says' healthy body image' on the cover and every two years you take up knitting for...a week ." Lemon is a Star Wars fan and is portrayed as a "geek ." She also lacks certain social skills and is a stress eater, particularly ingesting junk food . She is generally shown to have liberal political views . Despite her high standards in men, personified in her imaginary perfect husband, Astronaut Mike Dexter, Lemon has had some "really terrible boyfriends," but eventually finds happiness with Criss Chross, with whom she adopts two children . </P> <P> John Francis "Jack" Donaghy (Alec Baldwin) is the decisive, controlling, suave network executive who must deal with (and / or causes) unusual events at TGS . He is an Irish - American Catholic and a Republican . Donaghy is portrayed as a slick, brilliant and scrupulous network executive who directs many overtly backhanded compliments to Liz . Lemon (as he refers to her) and Donaghy have a work spouse relationship . Jack was married two times (and engaged two other times), and with his second wife, television reporter Avery Jessup, he has a daughter, Liddy Elizabeth Donaghy, named after Liz Lemon . Avery and Jack were divorced after her return from North Korea (where she was held hostage by Kim Jong Il) when they admit they only married because of Avery's pregnancy . Shortly after becoming the CEO of Kabletown, Jack suffered an emotional crisis and resigned, only to return to General Electric . </P> <P> Tracy Jordan (Tracy Morgan) is the loose - cannon star of TGS . He is a movie star with a reputation for erratic behavior . This reputation is well - deserved; much of it is an intentional attempt on his part to maintain his "crazy" persona in the eyes of the media . In the pilot episode, Jack Donaghy forces Liz Lemon to hire Tracy as the new star of her sketch comedy program The Girlie Show . To the chagrin of Liz and Jenna, Jack renames the show TGS with Tracy Jordan in the following episode . Tracy has remained the star of TGS ever since . </P>

He played liz and petes boss on 30 rock