Kathryn Marie Hahn (born July 23, 1973) is an American actress. She began her career on television, starring as a grief counsellor in the NBC crime drama series Crossing Jordan (2001–2007). Hahn gained prominence appearing as a supporting actress in a number of comedy films, including How to Lose a Guy in 10 Days (2003), Anchorman: The Legend of Ron Burgundy (2004), Step Brothers (2008), Our Idiot Brother (2011), We're the Millers and The Secret Life of Walter Mitty (both 2013), and Glass Onion: A Knives Out Mystery (2022).