Facinelli, 38, who announced his split from wife Jennie Garth in March after 11 years of marriage, is rumoured to be dating his 28-year-old former co-star after he was spotted bringing her to a screening of 'Breaking Dawn - Part 2' this week, reported Us magazine.
"She came to the screening a little earlier than him. He arrived with the cast and they took a photo with Ashley Greene. They seemed like they were in a really great mood. She stayed near him at the screening," a source said.
The couple were also photographed having dinner on Thursday together in New York before the movie and were seen at the after-party together.