Jessica Chastain takes the plunge in a sexy black beaded gown as she joins co-stars at the premiere of Memory during TIFF

Jessica Chastain was a sight to behold on Tuesday night at the premiere of her new film Memory during the Toronto International Film Festival.

The Academy Award-winner, 46, looked ultra glamorous in a plunging black beaded dress as she hit the red carpet ahead of the screening.

Jessica’s floor-length gown featured a blue, silver and green diamond pattern down each side as well as a sexy open back.

Her fiery red hair was swept over one shoulder and fell down her chest in straight strands.

The Help actress accessorized with a sparkly BVLGARI serpent choker — which retails for nearly $160,000.

Taking the plunge: The Academy Award-winner, 46, looked ultra glamorous in a plunging black beaded dress as she hit the red carpet ahead of the screening

As for makeup, Jessica amped up her porcelain complexion with peach blush and popped on a glossy pink lip.

She was photographed getting out of her chauffeured SUV just steps away from the Royal Alexandra Theatre in Toronto, Canada.

Jessica was accompanied by two suited security guards as she made her way to the red carpet.

At the premiere, the Molly’s Game actress reunited with her co-stars Peter Sarsgaard and Federica Garcia as well as the film’s director Michel Franco.

Also present were the film’s producers Alex Orlovsky and Duncan Montgomery. 

Memory is Jessica’s first performance since her Oscar-winning turn in The Eyes Of Tammy Faye.

Memory first premiered at the Venice International Film Festival last week.

In Memory, Jessica plays Sylvia, a social worker who leads a simple and structured life.

This is blown open when Saul follows her home from their high school reunion. Their surprise encounter will profoundly impact both of them as they open the door to the past,’ as per IMDB.

Just days after the film’s premiere, it was revealed that Jessica and director Michel will be working together once again on the film Dreams, according to Deadline.

Diamond darling: Jessica’s floor-length gown featured a blue, silver and green diamond pattern down each side

Glam: Her fiery red hair was swept over one shoulder and fell down her chest in straight strands

He dress also had a sexy open back

Reunion: At the premiere, the Molly’s Game actress reunited with her co-stars, including actor Peter Sarsgaard (pictured)

Also presented was the film’s director Michel Franco

Producers: Also present were the film’s producers Alex Orlovsky and Duncan Montgomery

Stunner: Federica Garcia stunned in a glitzy silver dress

She blew kisses at photographers during her red carpet stint 

Since July 17, Hollywood has ground to a halt as members of the SAG-AFTRA union joined the Writers Guild Of America in going on strike.

It sparked over growing concerns about the use of artificial intelligence and streaming residuals.

As per the strike rules, talent are prohibited from promoting any films from the companies represented by the AMPTP. 

However, many of the films debuting at TIFF are independent, which have resulted in a number of actors and actresses — including Jessica —landing interim agreements that would allow them to walk the red carpet and promote their films at the festival.