Tina Fey's portrayal of Liz Lemon in 30 Rock revolutionized the portrayal of female characters in sitcoms. Liz Lemon was a harried head writer of a sketch comedy show, juggling impossible personalities and personal life challenges. She was a messier, more openly chaotic evolution of the archetype of female characters in sitcoms, such as Lucy in I Love Lucy, Mary Richards in The Mary Tyler Moore Show, and Murphy Brown. Liz Lemon was allowed to be competent, petty, exhausted, selfish, generous, sharp, ridiculous, and deeply insecure all at once, making her a comedic demolition of the fantasy of modern womanhood.