"They're so excited," a friend of the couple told the mag. "They're a great couple. Rachel seems thrilled beyond belief."
When reached by Access Hollywood, a rep for Rachel would not comment on the star's personal life.
The former "The OC" starlet and the "Star Wars" prequels actor co-starred in the 2008 film "Jumper," and have reportedly dated since 2007.
"I'm happy and that's all that matters," Rachel told Page Six Magazine last September. "I have someone really great. Someone who can make me laugh—that's always what comes first. It's the best to be able to really, like, truly laugh with someone like they're your best friend, you know?"