United Kingdom, April 3 -- Sharon Stone has branded Robert De Niro "the best kisser in the business".

The 68-year-old actress starred opposite the screen legend in 1995's Casino and she'll never forget how he smooched her "right out of [her] shoes" during one particular scene.

Speaking on SiriusXM's Radio Andy, she said: "We did this scene where I have to go to the bathroom, and because I play this hustler, I get him to give me money to go.

"He gives me this money and I look at him like, 'Really? I think a little more than $50 for the bathroom.

"And he . reaches in and he gives me, like, $100, and then I lean over and I kiss him."

After DeNiro "knocked [her] out" with their kiss, director Martin Scorsese told them he had the shot he ...