Justin Timberlake has just got a little extra serious about his romance with actress Jessica Biel - he has moved her into his bachelor pad.

Sources claim Biel is preparing to move in with her man at his Hollywood Hills home.

One insider tells In Touch magazine, "They're both really excited. Jessica's giving her house to her parents and brother because she doesn't want to sell it."

Timberlake and Biel have been an item since early last year when she joined the pop star at the Sundance Film Festival in Utah.