People has confirmed reports that Hayden Christensen and Rachel Bilson got engaged quietly over the holidays. 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.