Alice appears in a flashback scene as little Liz Lemon in the wedding episode of the NBC comedy series, reported Ace Showbiz.
Alice recalled the time she became a bridesmaid at her aunt's wedding. The scene revealed the origin of Liz's signature eye roll.
'30 Rock' will air a new episode on December 6 before going on a winter hiatus.
It will return with the remaining episodes of the final season on January 10, 2013 and end its run with an hour-long episode on January 31.