Alex Kapp Horner (Alexandra Horner) (b. December 5, 1969) is an American actress who currently co-stars as Lindsay on the CBS sitcom The New Adventures of Old Christine.

She began her career Los Angeles as a member of The Groundlings comedy troupe. Some of her television credits include appearances on ER, Friends, Party of Five, JAG, Seinfeld, and Will & Grace.

Majored in history at Dartmouth College.

Her husband, Christian Horner, is the Vice President of Information Technology for Ticketmaster.

Daughters Jane, 6, and Ava, 4.

Attended the Chapin School, a private girls' school.

Lives in Los Feliz, California with her husband and daughters.