If it ain't broke: Jessica Chastain takes the plunge in a low-cut white gown after wearing similar shade to showcase stunning jewels at screening of Cleopatra

She wore a cream long sleeve gown to showcase a dazzling Bulgari sapphire and diamond necklace that once belonged to the late Elizabeth Taylor to the special 50th anniversary viewing of Cleopatra at the 66th Cannes Film Festival on Tuesday evening.

And Jessica Chastain stuck to a similar winning shade as she attended the Bulgari Hosts Cleopatra cocktail party following the film.

The stunning flame haired star looked just as stunning in a low-cut slinky gown.

A vision in white: Jessica Chastain wore a slinky white low-cut gown to the Cleopatra cocktail party hosted by Bulgari during The 66th Annual Cannes Film Festival at the JW Marriott on Tuesday night in Cannes, France

Jessica's bias cut gown was white and after wearing such a stand out jewel around her neck earlier, this time she opted to go without the glitter on her decolletage and instead slipped on a rather large diamond cocktail ring.

The Zero Dark Thirty also pinned back her wavy red hair into a half up and half down style and intensified her eyes with a heavy application of black eyeliner.

One again joining Jessica was actor Adrien Brody and his girlfriend Lara Lieto, who dazzled in a long sleeve gold sequined gown.

Stunning: The Zero Dark Thirty pinned back her wavy red hair into a half up and half down style and intensified her eyes with a heavy application of black eyeliner

Meanwhile, Spanish star Paz Vega went for an androgynous look in a white shirt and a pair of black trousers complete with cummerbund.

Daughter of the late Richard Burton, Kate Burton, was also in attendance and had earlier watched her father on the silver screen.

The 55-year-old, who herself is an actress and has starred in films such as Unfaithful and The Ice Storm, looked elegant in a floor length gown featuring sheer panelling and a matching jacket.

Iconic: Jessica posed in between Richard Burton and Elizabeth Taylor's original costumes from the iconic Cleopatra film

Show stopper: Earlier in the night, Jessica attended the special 50th anniversary viewing of Cleopatra

Dazzling: She wore a cream long sleeve gown to showcase a dazzling Bulgari sapphire and diamond necklace that once belonged to the late Elizabeth Taylor

Also attending cocktail hour in Cannes was actresses Laura Dern, Zhao Tao and Isabella Ferrari.

Earlier all guests had attended a special screening of Cleopatra as part of the iconic film festival.

The movie was one of the most iconic of its age, and marked the start of an epic real-life love story between Hollywood legends Burton and Taylor.

And Jessica had paid tribute to Tinseltown's golden couple by wearing the very special glittering diamond and sapphire necklace once owned by Taylor as she attended the event.

Strike a pose: Jessica posed with a very handsome Adrien Brody, who was dapper in a black tuxedo

Dazzling: At the cocktail party, Adrien posed with his girlfriend Lara Lieto, who dazzled in a long sleeve gold sequined gown

Looking good: The actor smouldered in his dapper attire

Different looks: Spanish actress Paz Vega opted for an androgynous look in a white shirt and black trousers, while Chinese star Zhao Tao looked pretty in a white and blue lace gown

The actress teamed the dazzling Bulgari piece - a gift from Burton to Taylor when theyfell in love on the set of Cleopatra - with a matching ring, and her simple cream draped floor-length gown by Versace.

Letting the incredible jewellery take centre stage, she kept the rest of her red carpet ensemble relatively simple.

Speaking about the iconic necklace and ring, Jessica told the Daily Mail: 'It was a symbol of their epic love.

Jaw-dropping: Paz also wore some incredible jewels by Bulgari

Lean: Laura Dern looked lean in her black gown featuring leather panelling

'I call them the Cleopatra jewels because Richard Burton bought them for Elizabeth Taylor when they fell in love when they were shooting Cleopatra. I'm so excited to be wearing them.'

Burton bought the stunning jewels in the early 1960s and through the 1970s, and they were re-purchased by Bulgari at a Christies sale last year following Elizabeth Taylor's death.

Jessica added: 'I feel so lucky to be wearing them. They looked so fabulous on her and she was a movie star from her head to her toes. That kind of glamorous star doesn't exist anymore but their diamonds do.'

Proud: Daughter of the late Richard Burton, Kate Burton, was also in attendance and had earlier watched her father on the silver screen

Adding some sparkle: Model Afef Jnifen and Becca Cason Thrash also attended

The actress admitted she would 'jump at any opportunity' to play Cleopatra on screen, adding: 'I don't think it's every going to happen but I would never turn it down if it ever came up.'

Twentieth Century Fox have restored and re-mastered the original four hour two minute full version of the epic movie about the cunning Egyptian queen and her romance with Mark Anthony, played by Burton.

Jessica was co-hosting the official screening with Taylor's son Christopher Wilding and Burton's daughter Kate.

To celebrate the 50th anniversary of the film's release, Cleopatra will be shown again in all its glory for a limited run at the Curzon cinema in Mayfair, London, from July 12 and selected other UK cinemas.