Katherine LaNasa is an American actress. She started her career in the 1990s, initially appearing in the films Catchfire and Brain Donors. Her first credited role was in 1994’s Flashfire. On TV, she made one-time parts in Seinfeld, The Marshal, The Crew, and 3rd Rock from the Sun, among others. Her first starring role on the small screen came in the 2000s, as Bess Bernstein-Flynn Keats in the sitcom Three Sisters. Afterward, she had recurring roles The Guardian, Miss Match, and Judging Amy. She went on to play Lydia in Two and a Half Men, as well as starred in the short-lived series Love Monkey and 12 Miles of Bad Road. During this period, LaNasa also had roles in the films Alfie and The Lucky Ones. She currently stars as Gloria Grandbilt in the new series Katy Keene.