Sidney Poitier, Hollywood's first major Black movie star and the first Black man to win the best actor Oscar, has died at 94, prompting an outpouring of grief from the entertainment industry and beyond.

Stars including Denzel Washington and former US president Barack Obama led emotional tributes as news broke on Friday of the death of the celebrated thespian.

"He was a gentleman and opened doors for all of us that had been closed for years," said double-Oscar winner Denzel Washington, in a statement.

"To Sir... with Love. Sir Sidney Poitier R.I.P. He showed us how to reach for the stars," tweeted Oscar-winner Whoopi Goldberg.

Bahamas Prime Minister Philip Davis said it was "with great sadness that I learned this morning of the passing of Sidney Poitier," confirming the passing of the dual US-Bahamian citizen.

No further details of Poitier's death were immediately confirmed.

Tackling bigotry and stereotypes

The first male Black star nominated for an Academy Award with 1958's "The Defiant Ones," Poitier six years later won his groundbreaking Oscar for "Lilies of the Field."

At a time of racial tension in America in the 1950s and 1960s, Poitier balanced success with a sense of duty to choose projects that tackled bigotry and stereotypes, including his 1967 classics "Guess Who's Coming to Dinner" and "In the Heat of the Night."

"For me, the greatest of the 'Great Trees' has fallen: Sidney Poitier," wrote Oprah Winfrey.

'Opened doors' 

Poitier was awarded an honorary Oscar in 2002 for his "extraordinary performances" on the silver screen and his "dignity, style and intelligence" off of it.

On television, he portrayed icons of history such as South Africa's first black president Nelson Mandela and the first Black justice on the US Supreme Court, Thurgood Marshall.

And in 1997, he took up a ceremonial post as Bahamian ambassador to Japan.

He was awarded the US Presidential Medal of Freedom - the country's highest civilian honor - by Obama in 2009.

"Through his groundbreaking roles and singular talent, Sidney Poitier epitomised dignity and grace, revealing the power of movies to bring us closer together. He also opened doors for a generation of actors," tweeted Obama.

"Michelle and I send our love to his family and legion of fans."

'One of a kind'

Poitier was married to his second wife Joanna since 1976, and had six children as well as numerous grandchildren and great-grandchildren.

"Sidney Poitier. What a landmark actor. One of a kind," said "Westworld" star Jeffrey Wright.

"He blazed a tremendous path for thespians such as me. I am forever grateful," added veteran actor Colman Domingo.

And messages poured in from beyond Hollywood, with Bollywood star Anil Kapoor praising "my childhood idol, lifelong inspiration & star of some of my favorite films."

"A great friend, I learned a lot from watching Sidney and how he carried himself with such grace and class," tweeted basketball legend Magic Johnson.

"It was a privilege to call Sidney Poitier my friend," wrote Washington, adding: "God bless him and his family.”