A 42 year-old French tourist, Karine Gombeau, carried out an impromptu act of kindness when she gave what appeared to be a homeless man her leftover pizza. 

Two days later she learned that the man was far from destitute, and was instead Hollywood icon Richard Gere.

The tourist, who revealed herself on Saturday saw Gere standing outside of Grand Central Station at approximately 5:45pm on Tuesday. According to Gombeau, who had just left a pizzeria in Little Italy, he was digging through a trash bin and drinking a beer from a brown paper bag.

“What’s in the bag?” Gere, 64, asked.

“I tried to tell him in English, but it came out half in French,” the Paris resident said.

“I said, ‘Je suis désolée [I am sorry], but the pizza is cold.’ ”

Apparently, millionaire beggars can’t be choosers.

“He said, ‘Thank you so much. God bless you,’ ” Gombeau recalled.

She didn’t learn that the undercover bum was actually a famous actor until a worker at the Salisbury Hotel, where she stayed in Midtown, handed her a copy of The Post two days later. She was stunned to find a photo of herself with the star inside the paper, she said.

“It was magical ... It’s crazy, this story. It’s unimaginable that something like this could happen,” she gushed.