Katherine is one of the four original cast members, originating the role of Brooke Logan, whose life on the show has been a roller coaster of unrequited love since 1987. Brooke has emerged as the show's quintessential heroine, always in turmoil, and until recently, forever chasing after Ridge Forrester.

Katherine is one of three children in a show business family. Her parents are Keith Wegeman, an Olympic long-jump skier who went on to play television's Jolly Green Giant, and Judith Lang, a film, television and commercial actress. Her grandfather was Charles Lang, a famed motion picture cinematographer.

Katherine graduated from Beverly Hills High School where she concentrated more on becoming a jockey or training for the Olympics than studying to be an actress. She took only a few drama classes in school, but fate guided her into her acting career. It began on the set of Skate Town USA when the producers took one look at Katherine and cast her as the lead's girlfriend. She signed with an agent and soon she was appearing on Happy Days, Masquerade, Magnum P.I. and several Last Precinct shows. Katherine also appeared in the Showtime miniseries Training Camp...First and Ten.

Katherine's first taste of daytime came when she was cast as Gretchen on The Young and the Restless. She also appeared in Discovery Bay produced by former daytimer Ellen Wheeler and co-starring Tom Eplin (who now plays Jake on As the World Turns). Not one to leave any genre untried, Katherine also starred in a horror film, The Nightstalker, which received very favorable reviews. Katherine has been featured in the film, Mr. Boogedy, for the Disney Channel, in the feature Til the End of the Night, and in all of the Beach Boys' music videos epitomizing her as the modern California Girl!

Katherine guest starred in several episodes of the syndicated series Lonesome Dove, where she played a tough gunslinger determined to avenge her brother's murder. Katherine also appeared in the original Showtime movie Flashframe, co-starring Ian Ziering.

Katherine loves sports and the outdoors. On any given weekend you may find her playing tennis, wind surfing, mountain bike riding or horseback riding. She owns several horses and competes in 25-mile and 50-mile cross-country endurance races. Katherine, at the very special invitation of the Sheik of Qatar, placed third in the International Desert Marathon in 1996. She competes throughout Southern California in races sponsored by the American Federation of Endurance Racing. She also jogs, takes dance classes (ballet and jazz) and studies voice. In her spare time Katherine pursues international modeling and commercial assignments throughout Europe.

Katherine received a nomination in 1990 for Outstanding Heroine for the Soap Opera Digest Awards and has received two consecutive M.V.P. Awards, given by Soap Opera Update magazine.

Katherine resides in California with her two sons, Jeremy and Julian, husband Alex D'Andrea and daughter Zoe Katrina, born on Mother's Day.