avengers

The film is the sequel to 2018's Black Panther, which starred the late Chadwick Boseman as T'Challa, the heroic crime-fighting king of Wakanda, a fictional African country with incredibly advanced technology.

The trailer opens with a female vocalist singing No Woman, No Cry, but there were some tears on stage as Boseman's castmates spoke of how much it meant to them to honour his memory through this new project.

Ryan Coogler, returning as director, spoke about how excited the T'Challa actor had been to see the first Black Panther footage five years ago at Comic-Con.

Her daughter, actress Rachael Stirling, said she died of cancer, after being diagnosed in March.

"She spent her last months joyfully reflecting on her extraordinary life, full of love, laughter and a deep pride in her profession," she added.

Dame Diana also played the only woman who became Mrs James Bond.

She played Tracy, who married George Lazenby's 007 in the 1969 film On Her Majesty's Secret Service.

Lazenby said he was "so sad" to hear of her death, while Bond producers Michael G Wilson and Barbara Broccoli also paid tribute.

Speaking at the Guardians Of The Galaxy Vol. 2 premiere, the actress, who plays Gamora, talked about the involvement of Guardians stars in the Avengers films.

Asked about the third Avengers film on Monday, she said: "I think the Guardians just shot their part when it comes to Infinity War.

"And we all have to go back for Gauntlet later this year."

But later on Tuesday, James Gunn, writer and director of the Guardians of the Galaxy franchise, denied Saldana had given the game away.