Comedian-actor Richard Pryor and Marlon Brando. Pictures: AP/Bang Showbiz

Richard Pryor's widow has confirmed that the late comedian had a sexual encounter with Marlon Brando.

Jennifer Lee Pryor - who was twice married to the iconic stand-up comic - has verified the claims first made by music producer Quincy Jones, who recently revealed that Pryor and Brando had a sexual encounter at the height of the actor's hedonistic days.

Jennifer - who said that Pryor would be "cracking up" at the thought of his fling being made public - told TMZ: "It was the 70s! Drugs were still good, especially Quaaludes. If you did enough cocaine, you'd f**k a radiator and send it flowers in the morning."

She added that the 'See No Evil, Hear No Evil' actor wrote in detail about his love life in his diaries, which are set to be released later this year.

Pryor was married seven times to five different women before his death in December 2005, after a lengthy battle with multiple sclerosis.

News of Pryor's sexual encounter with Brando first came to light during Jones' candid interview with Vulture published earlier this week.

The 84-year-old hitmaker also claimed that Brando had sex with novelist James Baldwin and music icon Marvin Gaye in the 1970s.

He explained: "Marlon used to go cha-cha dancing with us. He could dance his ass off. He was the most charming motherf***er you ever met. He'd f**k anything. Anything! He'd f**k a mailbox. James Baldwin. Richard Pryor. Marvin Gaye."

Asked again whether he knew for certain that they'd all slept with Brandon, Jones responded: "Come on, man. He did not give a f**k!"

In the same interview, Jones revealed that he briefly dated Ivanka Trump, the 36-year-old daughter of current US President Donald Trump.

He recalled: "Twelve years ago. Tommy Hilfiger, who was working with my daughter Kidada said, 'Ivanka wants to have dinner with you.' I said, 'No problem. She's a fine motherf**ker.' She had the most beautiful legs I ever saw in my life. Wrong father, though."