John Francis "Jack" Donaghy is a fictional character in the NBC sitcom 30 Rock. He is an NBC executive and a mentor to Liz Lemon. He is played by Alec Baldwin, who received two Emmy Awards, three Golden Globe Awards and seven Screen Actors Guild Awards for his portrayal of the character. Jack has a clear affinity for Liz, despite their ever-present conflicting moral values, which is a frequent source of friction in their relationship.