‘Grey’s’ star dating Jeter ex

MARRIED “Grey’s Anatomy” star Jesse Wil

liams and Derek Jeter’s ex Minka Kelly are “definitely seeing each other,” according to a source close to the actor.

“They started seeing each other last year. He ended things with his wife this year. He’ll be in Paris with Minka later this week. People know [about the relationship], but weren’t saying anything because he was still married,” the source said.

Kelly posted a photo of herself with Williams in France in January, but they have not publicly addressed claims that they’re seeing each other.

Friends have accused Williams of trading his family for Hollywood fame since news broke that he is leaving his wife, Aryn Drake-Lee.

“He’s going to wake up and be like, ‘What did I do?’ He has two children. This isn’t Hollywood, where you can say ‘cut.’ [He and Minka] are in lust,” the source said.

However, a source close to Williams insists that he only recently met Kelly while working on a video game in France — even though they appeared in the movie “Lee Daniels’ The Butler” together in 2013.

“They were both in the film, but never shot at the same time. They might have been at the same premiere event, but they never crossed paths. They only officially met when in France doing the video game,” the source said. “He’s been separated from Aryn since at least January. That’s when they were officially starting to deal with the process of it all.”

Williams is seeking joint custody of their children. An insider denied recent reports that he wants to withhold support.

“He doesn’t want the court to decide the alimony part of it — that doesn’t mean he’s not paying for child or spousal support. They’re working it out through mediation,” the insider said.

The first source said, “Aryn is not at home crying. She’s educated and healthy. She’s continuing to spend time with her family and network of friends while building her name in the art world in LA.” Reps for Williams and Kelly would not comment. Aryn could not be reached.