Sandra Bullock gets close to Bill Burr?

OHMYGOSSIP — Sandra Bullock is getting hot and heavy with her latest costar, comedian Bill Burr. The actress, 48, became friends with Burr, 44, on the Boston set of The Heat, and pals fear the Oscar winner could be falling for him, even though he’s got a girl­friend.

“Sandy hasn’t laughed so hard or looked so good in years – and it’s all thanks to Bill,” a source told the National Enquirer.

“They’re constantly joking and cutting up together. Sandy says they bonded so quickly be­cause they’re both of German-Irish descent, and they get each other’s quirky sense of humor.”

In The Heat, Sandra plays an FBI agent forced to team up with a Boston cop, played by Melissa Mc­Carthy, to bring down a Russian mobster.

“The crew nicknamed Sandy, Me­lissa and Bill the ‘Three Stooges’ because they’re a riot together,” the source said.

“One day Bill started throwing Doritos at the girls, and they retali­ated by lobbing apples at him!

“Another time he posted a sign on Sandy’s back that said, ‘Kick me, I’m a stuck up Hollywood b****.’ Sandy was completely clueless and walked around for hours while crew members snickered behind her back. Anyone else would have been furi­ous, but Sandy thought it was hilarious.

“Nobody wants to see Sandy hurt again, but it’s just so good to see her beaming.”