Oscars 2019: Which Oscars outfits have caused a stir？

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Media captionLady Gaga, Olivia Colman and all the Hollywood stars on the red carpet for the 2019 Oscar

The stars were out in full fashion force on the 90th Academy Awards red carpet.

As always, the celebs let their outfits do the talking in every colour under the rainbow.

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Here are the looks that have lit up social media so far this evening.

And the best dressed goes to....

Actor Billy Porter, who has won both a Tony and a Grammy for his role in Kinky Boots, stunned the red carpet in a custom tuxedo-gown.

Skip Twitter post by @theebillyporter

When you come to the Oscars, you must dress up. Thanks @CSiriano for creating this custom couture masterpiece. @OscarHeymanBros you have outdone yourselves with your iconic jewels. Style by @sammyratelle Grooming by Anna Bernabe. @TheAcademy #AcademyAwards2019 #oscars #oscars2019 pic.twitter.com/IpTG2OK20x

— Billy Porter (@theebillyporter) February 24, 2019

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End of Twitter post by @theebillyporter

The star of US drama TV series Pose, told Vogue he's “always been inspired by fashion” and that his outfits are all about coming to terms with his gay identity.

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Fashion fans have been raving about his Christian Siriano dress, for its perfect mix of the masculine and feminine.

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Superman-worthy cape

Is it a bird？ Is it a plane？ No, it's a bunch of celebrities wearing some pretty cool caped gowns.

Glenn Close, nominated for best actress for The Wife, wore a stunning gold lamé cape dress on the red carpet.

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Melissa McCarthy, also up for best actress for Can You Ever Forgive Me？ also jumped on the cape vibe in a black and white ensemble.

Image copyrightGetty ImagesVillanelle vibe

It seems that Killing Eve's favourite assassin has a few celebrity fans, judging by some of the looks on the red carpet.

Jodie Comer better look out, as she could have some rivals to contend with when season two comes around.

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American actress Linda Cardellini wore fuchsia taffeta on the red carpet. She is the star of 2018 film A Simple Favour.

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US singer Kacey Musgraves also looked pretty in baby pink - her dress is from the Giambattista Valli spring 2019 collection.

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Crazy Rich Asians' Awkwafina channelled served some serious looks in her glittery lilac tuxe by Dsqaured 2.

Image copyrightGetty ImagesRed carpet rainbow

Whilst last year's awards season was dominated by sombre colours as celebrities came out to support the #MeToo and Time's Up movements, 2019's Oscars were full of every colour of the rainbow.

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Dame Helen Mirren led the fashion pack in a vibrant Schiaparelli gown, completely with multi-toned pink chiffon and some seriously sparkling jewels.

Emma Stone and Rachel Weisz, who are both nominated for best supporting actress for The Favourite, fully embraced colour on the Oscars red carpet.

Emma wore a brown and gold Louis Vuitton dress, while Rachel rocked a red floral vinyl dress.

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New hair, new me？

Charlize Theron got the internet talking when she rocked the red carpet in a powder blue Dion gown and a brunette bob.

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All hail Queen Melissa McCarthy

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Olivia Coleman isn't the only one playing a royal at tonight's Oscars ceremony.

Melissa McCarthy presented the award for best costume in perhaps the most show-stealing look yet, a Tudor frock covered in fluffy (toy) rabbits. This paid homage to Colman's portrayal of Queen Anne's pet rabbits in The Favourite.

McCarthy's skit with Brian Tyree Henry, who looked equally fetching, has set social media alight.

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It costs how much？

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Did you recognise Lady Gaga's necklace when she stepped onto the red carpet earlier？

Not only was it by Tiffany & Co, but the 128-carat yellow neckpiece was last worn in 1961 by Audrey Hepburn on her Breakfast at Tiffany's press tour.

Oh and it's worth $30 million.