Scarlett Johansson and Colin Jost Shine at ‘Avengers: Infinity War’ LA Red Carpet Debut.

Scarlett Johansson has made her red carpet debut with boyfriend Colin Jost after almost one year of dating.

The actress, 33, and the SNL writer, 35, attended the premiere of the star’s new Marvel superhero movie, Avengers: Infinity War, at El Capitan Theatre in Los Angeles on Monday night.

Scarlett stunned in a glittering strapless metallic sequin gown as she linked arms with her love at the star-studded event.

Cute duo: Scarlett Johansson and boyfriend Colin Jost made their red carpet debut as a couple on Monday at the Avengers: Infinity War premiere in Los Angeles

The mother of one hit the purple carpet in strappy black heels with a glittering choker and coordinating bracelet.

Scarlett styled her dark brunette tresses pulled away from her face, opting for purple smokey eye makeup and pink lipstick.

The brunette turned on the carpet, revealing an intricate back tattoo.

Quite unique: The brunette turned on the carpet, revealing an intricate back tattoo

Stunning: Scarlett, who plays the Black Widow in the successful franchise, glittered in a sparkling embellished dress

Scarlett and Colin were first linked as a couple in May 2017, after she made a guest appearance on Saturday Night Live; Colin is a co-head writer at SNL.

She was previously married to Romain Dauriac; they have a two-year-old daughter named Rose Dorothy together.

Scarlett and Romain, a French journalist, married in October 2014 and split in mid-2016; their divorce was finalized September 2017.

Elizabeth Olsen, who plays Scarlet Witch, stunned in a lacy black jumpsuit at the evening premiere.

Happy duo: Scarlett and Colin were first linked as a couple in May 2017, after she made a guest appearance on Saturday Night Live; Colin is a co-head writer at SNL

So in love: She was previously married to Romain Dauriac; they have a two-year-old daughter named Rose Dorothy together; seen with Colin

Strike a pose: The 33-year-old actress flaunted a hint of cleavage in the low-cut strapless number, complete with a black fabric belt highlighting her slim waist