Hollywood icon Robert De Niro has said that he would like to punch Republican presidential nominee Donald Trump in the face.

De Niro's message to Trump didn't make the final cut of a celebrity "Get Out The Vote" advertisement, but "The Kelly File" show has obtained the footage.

De Niro said Trump is "so blatantly stupid", and called him almost every name including a "punk", a "pig", a "con", and an "embarrassment to this country", reported Fox News.

"He talks how he'd like to punch people in the face?" De Niro said. "Well, I'd like to punch him in the face."