Scott Caan, Kacy Byxbee

Scott Caan and his girlfriend Kacy Byxbee are expecting their first child together, his rep confirmed to Us Weekly.

"They haven't been keeping it private really, she's just been working on her business with her family so hasn't been around," a source told the magazine. "She's expecting very soon."

Surprising celebrity roommates

Caan, the son of James Caan, and Byxbee met on the set of Hawaii Five-0.

Watch Caan on Hawaii Five-0 here.