Nicole Julianne Sullivan (born April 21, 1970) is an American actress, voice artist and comedian. Sullivan is best known for her six seasons (1995–2001) on the sketch comedy series MADtv. She also played the role of Holly Shumpert for five seasons (2001–2005, 2007) on the CBS sitcom The King of Queens.
She has played a recurring character, Jill Tracy, on Scrubs and voiced the villainous Shego in Disney's Kim Possible. She had recurring voice roles on Family Guy and voiced "Franny Robinson" in Disney's Meet the Robinsons. From 2008 to 2009, Sullivan starred in and was the lead of her own Lifetime television series Rita Rocks. From 2008 to 2013, she voiced Marlene in The Penguins of Madagascar. Sullivan played Jules' (Courteney Cox) therapist, Lynn Mettler, on the comedy Cougar Town. She portrayed Lyla in the Disney Channel original movie Let It Shine in 2012. In 2013, she starred in the short-lived Nickelodeon sitcom Wendell and Vinnie as Wilma Basset.