RIHANNA and Cara Delevingne put on their most plunging necklines for a pre-premiere screening of their new film Valerian And The City Of A Thousand Planets in Paris tonight.

The co-stars went all out, with model Cara’s daring gown cutting right down to her navel.

Rihanna and Cara Delevingne showed off their assets with these plunging necklinesCredit: Splash News

The daring pair looked incredible at a pre-premiere screening of Valerian And The City Of A Thousand PlanetsCredit: Reuters

Posing together on the blue carpet, the pair beamed at the cameras as they posed for photographs before heading inside.

Cara has earned herself a string of high-profile acting jobs including in last summer’s blockbuster flick, Suicide Squad.

In the film, Valerian, played by Dane Dehaan, and Agent Laureline (Cara) embark on a mission to the intergalactic city of Alpha.

In this stunning, ever-expanding metropolis, different species from across the universe unite to improve the lives of all.

However, dark forces are at work in the city, which means Valerian and Laureline must save the human race, all while dealing with more than a hint of 𝑠e𝑥ual tension.

Rihanna, who also stars in Oceans Eight which is due for release next year, plays a shape-shifting cabaret performer called Bubble in the sci-fi extravaganza.

Their shimmering outfits made them stand out as they posed for picturesCredit: Getty Images

Cara’s risque neckline was cut to her navelCredit: Getty Images

While Rihanna’s Prada ensemble showed off her cleavageCredit: Getty Images

At the London premiere of the film yesterday, Rihanna turned heads in an eye-popping red dress designed by Giambattista Valli.

And it seems the 29-year-old wasn’t going to let her outfit for the Paris screening go unnoticed.

She stole the show in this Giambattista Valli gown at the London premiere of the sci-fi film yesterdayCredit: Getty Images – WireImage

The singer’s style team opted for a pink Prada skirt which had brightly coloured feathers at the bottom.

She completed the look with a bust enhancing crop top from the same designer, which was embroidered with pink tassels.

The pair have leading roles in the filmCredit: Getty Images

In which critics have claimed the SFX could rival that of Star Wars and Star TrekCredit: Getty Images

Cara meanwhile opted for a shimmering green dress which was almost completely open at the front.

The gown also had a split down one side to show off the 24-year-old’s long legs.

Valerian’s final trailer hinted the film will take cinema goers on a spectacular visual adventure.

Since starring in Suicide Squad, Cara has signed up for multiple filmsCredit: Getty Images

The model has made no secret of her acting ambitionsCredit: Getty Images

She took time to pose alongside her co-stars Dane DeHaanCredit: Getty Images

The pair mucked around before getting into positionCredit: Getty Images

And it seems Luc Besson’ passion project certainly won’t be lacking in stunning effects as the French graphic novels Valerian and Laureline make their way to the big screen.

Some critics have even claimed the SFX could rival those seen in Star Wars and Star Trek.

Valerian And The City Of A Thousand Planets is due for release in the UK on August 4.