It's the biggest catwalk in the world, a chance for the A-list to show off their best red carpet looks - from the ultra-glam to the ultra-outrageous.
Acting nominees Margot Robbie and Charlize Theron opted for navy and black, stars including Mindy Kaling, Florence Pugh and Kristen Wiig went for rainbow brights, while Sandra Oh and Rebel Wilson glittered in gold.
Billie Eilish was covered in Chanel, but not as you know it, while, as always, Billy Porter was a stand-out.
Here are some of the most striking looks from this year's Oscars red carpet.
Fashion royalty Billy Porter wore a dress inspired by Kensington Palace
Ruffles, bows, glitter - Sandra Oh has it all
Once Upon A Time... actress Julia Butters looked perfect in pink - and also took her own sandwiches to the show
Janelle Monae's jewel-encrusted silver hooded gown was one of the night's stand-out looks
Billie Eilish stood out in her Chanel suit and gloves
Mindy Kaling was sunshine bright in one-shoulder yellow and diamond sparkle
Spike Lee, with wife Tonya Lewis Lee, honoured the late Kobe Bryant with his purple Gucci '24' suit and trainers
Beanie Feldstein chose a floral black and white gown
Rebel Wilson looked gorgeous in gold sparkles
James Corden went for a traditional tux, while his wife, Julia Carey, drew attention in pale blue lace
Judy star Renee Zellweger chose a simple white, one-shoulder gown
Margot Robbie went for navy with a pendant detail and some killer sleeves
British actress Cynthia Erivo dazzled in white and silver
Charlize Theron's black gown featured a long train
Timothee Chalamet kept it casual in navy
Scarlett Johansson went for silky champagne sparkles
British star Florence Pugh chose turquoise ruffles for her first Oscars
Kristen Wiig's voluminous red dress divided opinion
Oscars queen Olivia Colman wore (navy) blue velvet - and debuted her new blonde 'do
Rooney Mara's beautiful black lace gown was a red carpet hit
Supporting actress winner Laura Dern went for pale pink with black tassels
Natalie Portman made a statement with a cape embroidered with the names of female directors snubbed this year
Booksmart star Kaitlyn Dever said she had chosen a 'completely sustainable' red Louis Vuitton gown
Costume designer Sandy Powell wore a signature suit
Saoirse Ronan stood out in black, cream and lilac ruffles
Mahershala Ali and Amatus Sami-Karim complemented each other on the red carpet
And finally, Brie Larson stunned in a sparkling caped gown
