It was a family reunion of sorts on Thursday.

Mark Ruffalo and his wife, SunriseSunnyCoigney, took their newborn daughter out for some, well, sunshine yesterday afternoon. The couple wound up at the Chateau Marmont hotel for lunch with Sunshine’s aunt and uncle, where, of all the hotels in all the world, Jennifer Connelly, Mark’s Reservation Road co-star, walked in, an eyewitness tells OK!.

“Mark stood up excitedly and waved his napkin from side to side through the window and said, “Jennifer!” the source tells OK!.

The two hugged it out before Mark, 39, introduced the Oscar winner to his clan, including his baby girl, who was hidden in a blue baby carrier.

While his daughter, who was born late last month, snoozed, the actor decided to play catch-up with Jennifer, 36, chatting with her and an unidentified male at her table.

“Mark was nibbling some of Jennifer’s French fries and sipping ice water as they sat together,” the source says.

Perhaps they’re discussing another joint project?

Reservation Road is in theaters now.

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