Poehler's appearance as an awkward teenage Liz Lemon was the comedic actress' first appearance on "30 Rock."
The "Parks and Recreation" star was shown prank-calling a young Jack Donaghey (Alec Baldwin), who was portrayed by Jimmy Fallon.
The live episode, "Live From Studio 6H" was filmed twice for the East and West coasts. The episode featured several flashbacks from previous fictional live shows.
Kim Kardashian and Sir Paul McCartney made brief cameos, portraying themselves on the East Coast and West Coast episodes, respectively.
Guest stars also included Jon Hamm, who appeared in a parody of "Amos 'n' Andy" and as a newscaster and "Community" star Donald Glover, who appeared in a flashback as a young Tracy Jordan (Tracy Morgan). Glover got his start as a writer for "30 Rock" when he was 22 years old.
Many of the guest stars on the special episode were alumni from "Saturday Night Live," including Poehler, Fallon and Fred Armisen.
"30 Rock" began in 2006 and is loosely based on Fey's experiences on the NBC sketch comedy show "Saturday Night Live." The show has won 14 Emmy Awards, including "Best Comedy Series." The sixth season premiered on January 12.
Poehler is a former "Saturday Night Live" cast member and has appeared with her former co-star, Fey, in the 2008 comedy "Baby Mama" and the 2004 Lindsay Lohan movie "Mean Girls." Poehler received two Emmy nods for her roles on "Saturday Night Live" was nominated twice for her part on "Parks and Recreation."
Poehler has also starred on shows such as the comedy series "Undeclared" and "Arrested Development," which featured Will Arnett, her husband and father of their two sons.