US acting legend Redford, best known for roles in Butch Cassidy and the Sundance Kid and The Sting, has died at the age of 89.
In a statement, his publicist Cindi Berger, said: Robert Redford passed away on September 16 at his home at Sundance in the mountains of Utah - the place he loved, surrounded by those he loved. He will be missed greatly. The family requests privacy.
Tributes have been paid to the Oscar-winning star by actors including Meryl Streep and Jane Fonda.
Redford, also famous for founding Utah's Sundance Film Festival, won a best director Oscar in 1980 for Ordinary People. He announced his retirement from performing in 2018, having said in 2016 that he was tired of acting.
Hollywood actress Streep, who co-starred with him in Out of Africa, led the tributes, saying: One of the lions has passed. Rest in peace my lovely friend.
Fonda, a lifelong friend of Redford who starred alongside him in films such as 1967's romcom Barefoot in the Park, said he was a beautiful person in every way.
Director Ron Howard described Redford as a tremendously influential cultural figure and an artistic gamechanger.
Speaking to the BBC, actor Leonardo DiCaprio described Redford as an absolute legend and said that his death is a horrible loss.
It was 1969's Butch Cassidy and the Sundance Kid, a Western film about two bank robbers, co-starring Paul Newman, that made Redford an overnight star.
Despite his success, Redford was never comfortable with his tag as a good-looking heartthrob, expressing concerns about public perception of his image.
Though he enjoyed fame and success in Hollywood, Redford's significant contributions include the founding of the Sundance Film Festival, which has become a key platform for independent filmmakers.
Redford leaves behind his wife Sibylle Szaggars and two daughters. His legacy in film and activism is celebrated by fans and fellow actors alike.
