Cannavale, 36, discreetly split from gal pal Annabella Sciorra, 47, in October after three years of dating.
Now a source tells me he is seeing fresh-faced Alison Pill, 22, who was his recent co-star in the limited run of "Mauritius" at the Biltmore Theater.
Based on a story by acclaimed Canadian author Farley Mowat, this is a beautifully rendered tale, set in the gorgeous but desolate Arctic.Kanaalaq teaches him the skills he will need to survive and he comes to respect her wisdom and love her valiant spirit as they each set out into the wilderness.Each will find a startling and solitary destiny in the beautiful and stark tundra. "They've been dating for a few months," a source tells Us Weekly. "They were sitting in a booth and he had his arm around her and they would kiss from time to time," a fellow attendee reveals."I think Rose is a good match for him." PHOTOS: Celebrity couples who dress alike The actors were spotted packing on the PDA at the afterparty at No. "They definitely tried to keep a low profile and left at separate times." PHOTOS: Will these star couples last?