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. Actor Leonardo DiCaprio described him as an absolute legend and said that his death is a horrible loss.
Over his illustrious career, Redford's contributions to film extended beyond acting, with his establishment of the Sundance Film Festival providing a platform for independent filmmakers. Many Oscar-winning films, including Coda, found their roots at Sundance, a testament to Redford's enduring impact on cinema.
At the time of his passing, Redford was surrounded by his loved ones, leaving behind a legacy that will influence generations.