Justin Timberlake can no longer call his house a bachelor pad — he’s asked his girlfriend, Jessica Biel, to move in! “Jessica is preparing to live in Justin’s Hollywood Hills home,” an insider tells In Touch. “They’re both really excited.” But the 26-year-old actress is also hanging on to her own Brentwood, Calif., digs. “Jessica’s giving the house to her parents and brother because she doesn’t want to sell it,” the insider adds. It’s a big deal for Justin, 27, who has never taken this relationship step before, but the insider insists that he’s ready. “They’re definitely headed for marriage,” the insider says. “Moving in is just the beginning.” So how does the couple — who have been together since January 2007 — make it work? “They avoid the spotlight as much as possible,” the insider adds. The couple has been apart while Jessica’s been filming in South Carolina. There’s plenty of room for Jess in Justin’s six-bedroom mansion.

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