Katherine Upton is a recurring character on 90210, portrayed by Lisa Waltz.
Katherine is introduced as the woman who interviews Annie Wilson at the Abbott Playhouse for an internship. Although Annie purposely blows the interview by revealing she was involved in a hit-and-run, Katherine respected her honesty and offered her the internship, though she had some ulterior motives.
She soon began complimenting Annie on her body, looks, and good looks, making Annie think she has a crush on her. However, it is soon revealed that the couple wishes to use Annie's eggs to have a baby. Annie initially agreed because her family needed money, but Debbie Wilson put a stop to her plans.
Katherine later fired Annie after Emily Bradford manipulated everyone into believing that Annie was unbalanced.