Celebrity Rachel Bilson and Hayden Christensen Are Engaged The actress is "thrilled beyond belief," a source tells PEOPLE By Brian Orloff Published on February 18, 2009 01:00 PM Share Tweet Pin Email Photo: Dimitrios Kambouris/WireImage Rachel Bilson and her longtime beau, Hayden Christensen, got engaged quietly over the holidays, PEOPLE has learned. According to a friend of the actress, the two, who costarred in 2008’s Jumper, got engaged in December. “They’re so excited,” says the pal, adding that no wedding date has been set. “They’re a great couple. Rachel seems thrilled beyond belief.” When contacted, Bilson’s rep told PEOPLE, “I don’t comment on my clients’ personal lives.” A rep for Christensen had no comment. The engagement news was first reported by the New York Post‘s Page Six. • Reporting by ALEXIS CHIU and LISA INGRASSIA RELATED ARTICLES:• 2007: See Rachel without a drop of makeup!• 2002: Hayden is one of PEOPLE’s’ ‘Most Beautiful’! RELATED GALLERY:• Read more celeb proposals on the covers of PEOPLE