Frances McDormand, Gary Oldman, Allison Janney and Sam Rockwell have all been added to the list of Oscars presenters at this year's ceremony, having all picked up awards last year.

McDormand took home the Academy Award for Best Actress for Three Billboards Outside Ebbing, Missouri, while co-star Rockwell won the Supporting Actor gong for his performance in the Martin McDonagh-directed film.

Sam Rockwell and Frances McDormand in Three Billboards Outside Ebbing, Missouri

British actor Oldman was honoured with the Best Actor award for his portrayal of Winston Churchill in Darkest Hour, while Janney won Supporting Actress for her role in I, Tonya.

The Academy tweeted: "Last year, Allison Janney, Frances McDormand, Gary Oldman and Sam Rockwell had their names read from an envelope and they took home Oscar gold.

"This year, they'll help make more dreams come true. We're thrilled to announce they'll be presenters at this year's show."

They join previously announced presenters including Brie Larson, Charlize Theron, Daniel Craig, Jennifer Lopez, Whoopi Goldberg and Chris Evans.

The first round of Oscar presenters was announced on Tuesday.

This year's ceremony will be host-less for the first time in 30 years after comedian Kevin Hart pulled out amid a controversy over past homophobic tweets.

The 91st Oscars will be held in Los Angeles on February 24.

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