Kathryn Hahn (born July 23, 1973) is an American actress. She began her career on television playing Lily Lebowski in the NBC crime drama series, Crossing Jordan (2001—2007). Hahn went to appearing as supporting actress in a number of comedy films, include How to Lose a Guy in 10 Days (2003), (2004), Step Brothers (2008), Our Idiot Brother (2011), We're the Millers (2013) and The Secret Life of Walter Mitty (2013).