Oscar 2019: Everything you need to know about the 91st Academy Awards

From who's nominated, to some interesting facts about the nominations, here's everything you need to know about the Oscars 2019.

When is the Oscars 2019?

This year it will be the 91st Academy Awards and they'll take place on Monday, 25 February in the US.

As always the ceremony will take place at the Dolby Theatre in Hollywood.

The awards are expected to start at around 2pm NZ time.

Who's presenting?

The Oscars are without a host for only the fifth time in its 91-year history.

Shortly after being announced as host, Kevin Hart was forced to withdraw over years-old homophobic tweets that the comedian eventually apologised for. That left the Oscars, one month before its 24 Feb ceremony (25 Feb NZ time), without an MC - and the academy decided it would stay that way.

It wasn't the only controversy in the lead-up to the ceremony.

The academy reversed its decision to present four awards during the commercial breaks after a backlash, and after first planning to limit the best song nominee performances it confirmed that all songs will indeed be performed.

Who's nominated for an Oscar?

Best picture: Black Panther, BlacKkKlansman, Bohemian Rhapsody, The Favourite, Green Book, Roma, A Star Is Born, Vice.

Best director: Alfonso Cuaron, Roma; Spike Lee, BlacKkKlansman; Pawel Pawlikowski, Cold War; Yorgos Lanthimos, The Favourite; Adam McKay, Vice.

Best actor: Christian Bale, Vice; Bradley Cooper, A Star Is Born; Rami Malek, Bohemian Rhapsody; Viggo Mortensen, Green Book; Willem Dafoe, At Eternity's Gate.

Best actress: Yalitza Aparicio, Roma; Glenn Close, The Wife; Olivia Colman, The Favourite; Lady Gaga, A Star Is Born; Melissa McCarthy, Can You Ever Forgive Me?

Best supporting actor: Mahershala Ali, Green Book; Sam Elliott, A Star Is Born; Adam Driver, BlacKkKlansman; Richard E. Grant, Can You Ever Forgive Me?; Sam Rockwell, Vice.

Best supporting actress: Amy Adams, Vice; Marina de Tavira, Roma; Regina King, If Beale Street Could Talk; Emma Stone, The Favourite; Rachel Weisz, The Favourite.

Original Song:When A Cowboy Trades His Spurs For Wings from The Ballad of Buster Scruggs, music and lyrics by David Rawlings and Gillian Welch; All The Stars from Black Panther, music by Mark Spears, Kendrick Lamar Duckworth, Anthony Tiffith and lyrics by Kendrick Lamar Duckworth, Anthony Tiffith and Solana Rowe; I'll Fight from RBG, music and lyrics by Diane Warren; The Place Where Lost Things Go from Mary Poppins Returns, music by Marc Shaiman and lyrics by Scott Wittman and Marc Shaiman; Shallow from A Star Is Born, music and lyrics by Lady Gaga, Mark Ronson, Anthony Rossomando and Andrew Wyatt.

Original Score: Black Panther, Ludwig Goransson; BlacKkKlansman, Terence Blanchard; If Beale Street Could Talk, Nicholas Britell; Isle of Dogs, Alexandre Desplat; Mary Poppins Returns, Marc Shaiman.

Foreign language film: Germany's Never Look Away; Japan's Shoplifters; Lebanon's Capernaum; Mexico's Roma; Poland's Cold War.

Documentary feature:Free Solo, Hale County This Morning, This Evening, Minding the Gap, Of Fathers and Sons, RBG.

Documentary short subject:Black Sheep, End Game, Lifeboat, A Night at The Garden, Period. End of Sentence.

Adapted screenplay: The Ballad of Buster Scruggs, Joel Coen and Ethan Coen; BlacKkKlansman, Charlie Wachtel, David Rabinowitz, Kevin Willmott and Spike Lee; Can You Ever Forgive Me?, Nicole Holofcener and Jeff Whitty; If Beale Street Could Talk, Barry Jenkins; A Star Is Born, Eric Roth, Bradley Cooper and Will Fetters.

Original screenplay:The Favourite, Deborah Davis and Tony McNamara; First Reformed, Paul Schrader; Green Book, Nick Vallelonga, Brian Currie and Peter Farrelly ; Roma, Alfonso Cuaron; Vice, Adam McKay.

Film Editing:BlacKkKlansman, Barry Alexander Brown; Bohemian Rhapsody, John Ottman; The Favourite, Yorgos Mavropsaridis; Green Book, Patrick J. Don Vito; Vice, Hank Corwin.

Sound Editing: Black Panther, Bohemian Rhapsody, First Man, A Quiet Place, Roma.

Sound Mixing:Black Panther, Bohemian Rhapsody, First Man, Roma, A Star Is Born.

Visual effects: Avengers: Infinity War; Christopher Robin; First Man; Ready Player One; Solo: A Star Wars Story.

Makeup and hairstyling:Border; Mary Queen of Scots; Vice.

Costume design: The Ballad of Buster Scruggs, Mary Zophres; Black Panther, Ruth Carter; The Favourite, Sandy Powell; Mary Poppins Returns, Sandy Powell; Mary Queen of Scots, Alexandra Byrne.

Production design:Black Panther, The Favourite, First Man, Mary Poppins Returns, Roma.

Cinematography:Lukasz Zal, Cold War; Robbie Ryan, The Favourite; Caleb Deschanel, Never Look Away; Alfonso Cuaron, Roma; Matthew Libatique, A Star Is Born.

Best animated film:Incredibles 2, Isle of Dogs, Mirai, Ralph Breaks the Internet, Spider-Man: Into the Spider-Verse.

Animated short film:Animal Behavior, Bad, Late Afternoon, One Small Step, Weekends.

Live Action short film:Detainment, Fauve, Marguerite, Mother, Skin.

Some fun and interesting facts about the nominations:

• After more than 30 years and some two dozen films, Spike Lee received his first Academy Award nomination for best director for BlacKkKlansman. It's also the first time one of his movies has been nominated for best picture.
• Glenn Close's best actress nomination for The Wife is her seventh, and could finally mean her first Oscar. She has more nominations without a win than any other living actor or actress.
• Black Panther is the first Marvel movie - and the first superhero film of any kind - to be nominated for best picture. Its $700 million box-office take is more than the earnings of the other seven best-picture nominees combined.
• Roma is the first Netflix film to be nominated for best picture
• Sam Elliott's first Oscar nomination - for best supporting actor in A Star Is Born - comes 50 years after his first acting credit, on the TV series Judd for the Defense.
• Rami Malek, nominated for playing Queen frontman Freddie Mercury in Bohemian Rhapsody, is the only first-time Oscar nominee among the men up for best actor. He's up against multiple nominees Christian Bale, Bradley Cooper, Viggo Mortensen and Willem Dafoe.
• Yalitza Aparicio's nomination for Roma comes in her first role as an actress.
• This is the second of Hollywood's four versions of A Star Is Born, to get a best picture nomination, along with the 1937 original. The 1954 and 1976 versions each got several Oscar nominations, but not for best picture.
• No women were nominated for best director this year. The number of female directorial nominees in the 91-year history of the Oscars remains five.
• Eighty-seven countries submitted movies to be considered for best foreign language film. Five got nominations : Germany, Japan, Lebanon, Mexico and Poland.
• Bob Hope hosted the Oscars a record 19 times. No one is scheduled to host this year's ceremony.

- AP