Ryan Gosling and Eva Mendes Dating?

On Saturday, Ryan Gosling and Eva Mendes hit Disneyland in Anaheim, Calif., where they held hands and kissed, as exclusive Us Weekly photos show.

"They were very playful," an observer tells Us. "Eva was skipping around like a little girl...She would lean into him and she held his arm the entire time."

"She fed him," the onlooker says.

"It hasn't been a secret how excited Eva's been to film with him, and she's always joked with us about how gorgeous he is," the source adds. "She's never been shy about having the hots for him!"