Katie Wagner was born on May 11, 1964 in Los Angeles, California to actor Robert Wagner and his wife, Marion Marshall. In 1987, Katie got her big break when she and her dad were featured on the TV show, Born Famous (1987). The show's host asked her what she would like to do and she answered "I would like to do what you do". Her first gig was interviewing Dan Aykroyd and his wife, Donna Dixon, for the ABC special, "M & W". That interview led Katie to a two-and-half-year run on Movietime network (Now E!) She also had minor roles in two movies, and dated rocker Dweezil Zappa. She also worked as an MTV VJ and hosted the Great Britian show, "Hollywood Report". She also filled in for Chris Connelly on The Big Picture (1988), co-hosted 22 episodes of the TBS show, "Live from the House of Blues", and joined Robin Leach for the final two seasons of Lifestyles of the Rich and Famous (1984). She also made another guest spot in a movie, Dill Scallion (1999), where she played a reporter.

In 1999, Katie joined TV Guide Channel where she hosted "Music News", "What's On" and "TV Talk". She also interviewed many celebrities including Ty Pennington, Rod Stewart and her dad, Robert Wagner. She left in June 2004 to pursue other hosting gigs. Later that year, she guest-starred in Charmed (1998) and was featured on Good Day Live (2001) with her dad. In 2005, she hosted the short-lived WB reality show, The Starlet (2005). Katie, now 42, is getting ready for her biggest and best job of all - motherhood.