Cast » Jennifer 'Jen' Clark

Jennifer 'Jen' Clark is played by Sara Foster. Jen is Naomi's older sister who has been away for most of the series. Her existence was brought up in the pilot episode, when Naomi tries to convince her mother that "She's as smart as Jen." In other episodes, Naomi reveals that they are not on speaking terms. Jen comes back to Beverly Hills in the episode "The Dionsyian Debacle". It is revealed later in the episode that she took Ethan's virginity. We find out that Jen is a student at Yale University and studies art history in Paris and lived in Nice for awhile. She gets romantically involved with Ryan Matthews and skirmishes with Kelly Taylor, who claims that Jen stole a paper from another girl in high school in order to become the valedictorian of her graduating class. Jen appears to be broke, as she states to Ryan that she blew through a million dollars in 2 months, and also by the fact that she maxed out Naomi's credit card. In Zero Tolerance, Jen gets a phone call from who is known to be her husband Olivier, who Jen wants a divorce from. In the season 1 finale, she tricks Liam into thinking that she is Naomi's neighbour and sleeps with him. In season 2, Jen continues to manipulate Naomi into giving her more money, and she begins a relationship with Matthews. In reality, however, she has no real interest in Matthews. Rather, she merely uses him to convince other rich men that she is not a gold digger. However, the truth about her night with Liam is revealed to Naomi and she loses everything, including Ryan and Naomi. She later returns to Beverly Hills, and tells Naomi that she's the new owner of the Beverly Hills Beach Club. It is revealed that Jen is six years older than Naomi. In episode 21 of season 2, she shows Naomi her pregnant belly and says " You're going to be an auntie." Matthews is the biological father, but Jen tells him that she does not need his support. She is eventually put on bedrest by her physician and must rely on Matthews after her personal assistant quits due to her unreasonable demands. She grows softer after giving birth to a boy she names "Jacques" though she is shown to be inept at childcare. Ryan moves in with her to help care for the child, but one night finds the house deserted and a note from Jen saying she has left since she is a bad mother. Although she is manipulative and cunning, she is shown to be very intelligent; having knowledge of Aristophanes and his works. In addition, she is shown to have an interest in reading.

Sara Foster guest-starred as herself on the HBO series Entourage, in which she had a romantic tryst with character Vincent Chase (played by actor Adrian Grenier) before appearing on Jimmy Kimmel Live in the episode "Talk Show". She briefly hosted Entertainment Tonight spin-off ET on MTV in 2002. Based on that she was cast as the lead femme fatale in The Big Bounce in 2004, a remake of a movie adaptation of the same novel by Elmore Leonard. She also appeared in the Backstreet Boys video "Shape of My Heart". In 2005, she played crime-fighting lesbian girl Amy Bradshaw in Angela Robinson's 2004 film D.E.B.S.. As of 2009, she signed on for the major recurring role of Jen Clark on the TV show 90210 . So far, she has appeared in every season of the show. Additionally, Foster stars in the science-fiction film Psych 9., which was directed by Andrew Shortell.

Sara is currently engaged to Tommy Haas; On November 15, 2010, Haas announced on his website that Sara had given birth to a baby girl.