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She made her red carpet debut with boyfriend Leonardo DiCaprio for his latest film Once Upon A Time In Hollywood at the 72nd annual Cannes Film Festival on Tuesday. 

And Camila Morrone led the glamour in a red feathered minidress as she headed to the movie's afterparty held at the JW Marriott. 

Joined by the star-studded cast, the American actress, 21, looked ethereal as she arrived at the event in a stunning pale yellow strapless gown before making a quick change into her party outfit.   

Partytime! Leonardo DiCaprio's younger girlfriend Camila Marrona led the glamour in a red feathered minidress as she headed to Once Upon A Time In Hollywood's after-party held at the JW Marriott on Tuesday

Camila flaunted her tremendous pins in the thigh-skimming minidress, which was adorned with feathers on the hemline and cuffs. 

The model added a boost to her height with matching satin heels and slicked back her raven tresses into a sleek bun, while accentuating her model looks with a bronze pallet of make-up in nude tones.

Camila appeared in high spirits as she posed solo at the party, no doubt jovial about make her red carpet debut with her Hollywood beau Leonardo, 44.  

Feathers: Camila flaunted her tremendous pins in the thigh-skimming minidress, which was adorned with feathers on the hemline and cuffs

DiCaprio and Morrone have been dating since December 2017, but there was talk last year that the Django Unchained star was finally getting ready to settle down.

A source told US Weekly last November that the couple was, 'very serious' and, 'everyone is saying that marriage could be soon for them.'

'They’ve talked about getting engaged,' with the source adding that DiCaprio is now even, 'ready to have kids.'

 Gorgeous: Joined by the star-studded cast, the American actress looked ethereal as she arrived at the event in a stunning pale yellow strapless gown before making a quick change into her party outfit

Delighted: Camila appeared in high spirits as she posed solo at the party, no doubt jovial about make her red carpet debut with her Hollywood beau Leonardo, 44

60s inspired look:Margot Robbie meanwhile opted for a quirky glittering pink tunic and bold sequinned black trousers, which she had worn to the screening. The actress, 28, posed with Timothée Chalamet (centre)

Comradery: Director Quentin Tarantino shared a laugh with Brad Pitt, who stars in the film, at the bash 

Stunning: Valentijn (L) and Doutzen Kroes also attended the Once Upon A Time In Hollywood afterparty

Vixens: Nina Dobrev and Winnie Harlow (centre)  wowed in black gowns. Nina opted for a strapless sweetheart embellished dress with daring thigh-high split, while Winnie cut a dramatic figure in a feathered mindress 

Strike a pose: The Vampire Diaries star, 30, (L) and the model, 24, (R) posed up a storm for the cameras 

Fantastic: Dakota Fanning exuded elegance in her pale gold silk gown with extravagant bow as she celebrated the launch of the film, in which she stars in 

Margot Robbie meanwhile opted for a quirky glittering pink tunic and bold sequinned black trousers, which she had worn to the screening. 

The Australian beauty completed her throwback look with a pair of slingback heeled ankle boots and a statement black choker. 

The actress, 28, stars as Hollywood icon Sharon Tate in Quentin Tarantino's hotly-anticipated flick. 

Here come the girls: Daniella Pick wowed in a her red carpet silk gown before changing while Valerie Pachner (centre) opted for a lime midi dress. Madalina Diana Ghenea (L) looked sensational in her one shouldered frock

Risque: Daniella later sent temperatures soaring as she slipped into a racy black cut-out gown as she posed with husband Quentin, who directed the film

The premiere of Once Upon A Time In Hollywood was the first time Camila has accompanied her boyfriend Leo to a red carpet.  

The first official full trailer has been released for Once Upon A Time In Hollywood which coincidences with the premiere at Cannes, and like the earlier teaser it features Brad Pitt, Leonardo, and Margot Robbie. 

As much of the plot has been kept under wraps, the trailer for Quentin Tarantino's ninth full length feature sheds more light on the relationship between Brad and Leo's characters, Robbie's portrayal of Sharon Tate, and how Charles Manson and 'family' will be featured in the film. 

Partytime: Zoe Bell (L) and a guest attended the Once Upon A Time In Hollywood After Party

Having a blast: Michelle Rodriguez, Adrien Brody, Winnie Harlow, and Mohammed Al Turk (L-R) beamed for a photo 

The movie is a character comedy/drama set in 1969 in Los Angeles, with multiple story lines paying tribute to what is widely known as Hollywood's 'golden age.' 

The ninth film from the writer-director Tarantino features a large ensemble cast and multiple storylines in a tribute to the final moments of Hollywood's golden age.

Once Upon A Time In Hollywood will hit US theaters on July 26 and is set for a UK release on August 14. 

The 2019 Cannes Film Festival takes place at the iconic Palais des Festivals from Tuesday until May 25. 

Handsome: Vincent De Paul looked dapper in his two piece suit and bow tie 

Actress Elle Fanning, French graphic novelist Enki Bilal and the Oscar-nominated director of The Favourite, Yorgos Lanthimos, will be among jury members during the annual event.  

Mexican director Alejandro Gonzalez Iñárritu will preside over the panel that decides on prizes, including the top Palme D'Or award.

The jury for the festival's 72nd edition will also include Pawel Pawlikowski, the Polish filmmaker and screenwriter named best director at Cannes last year for the impossible love story Cold War.

Maimouna N'Diaye, who has directed documentaries and acted in films such as Otar Iosseliani's Chasing Butterflies will also sit on the panel, alongside two other female directors.

Kelly Reichardt, whose Wendy and Lucy starring Michelle Williams was a contender for Cannes' Un Certain Regard award in 2008, directed 2016's Certain Women.

Italy's Alicia Rohrwacher won best screenplay at Cannes last year for her film Happy as Lazzaro, a satirical fable about a peasant family.

French filmmaker Robin Campillo, who took Cannes by storm in 2017 with 120 BPM - Beats Per Minute, winning the Grand Prix for his movie about an AIDs activist, will complete the line-up.

Stunning: Sara Sampaio (L) and Madison Headrick (R) cut glamorous figures as they enjoyed the alfresco party 

What a night! The a-list gyests mingled at the JW Marriott hotel, enjoying al fresco bash underneath the palm trees