Cibrian, 44, and Bilson, 36, were all smiles on their set in Vancouver, Canada.
The handsome actor and pretty actress were seen laughing out loud together and Rachel seemed happy to be around him in the cold weather.
No doubt his country crooner wife LeAnn Rimes, 35, will have had something to say to him when he got home.
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The former O.C. star is single after splitting with Hayden Christensen.
Radaronline.com reported how Cibrian and Rimes recently returned from a romantic Mexican vacation.
Cibrian had previously blasted his ex-wife Brandi Glanville about claims that LeAnn had been stalking her.
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