Patricia Beth "Tricia" O'Kelley (born September 26, 1968) is an American actress and producer, best recognized as Marly Ehrhardt on the CBS sitcom The New Adventures of Old Christine (2006–10). She may also be known for her recurring role as Nicole Leahy on The WB television series Gilmore Girls (2003–04) as well as the lead role in the independent comedy film Weather Girl (2009).
O'Kelley began her acting career in commercials. In the 1990s, she founded a resource center for aspiring actors in Chicago that provided workshops, career consultations and seminars. As of the late 1990s, she began her career on television, including guest-starring roles on Frasier, Suddenly Susan, Everybody Loves Raymond, Two and a Half Men, CSI: Crime Scene Investigation, Back to You, Malcolm in the Middle and starring roles in short-lived series Emeril and That Was Then. She also had a recurring role in The WB family drama series Gilmore Girls, as Nicole Leahy from 2003 to 2004.