Blake Lively's Ab-Baring Double Denim Look

Blake Lively looked sensational in an ab-baring double denim outfit as she promoted her new film It Ends With Us this week.

The Gossip Girl alum, 36, took to Instagram to show off the chic look that consisted of a denim bralette top, blazer and flared pants.

For a personal touch, Lively decked out the trendy Cinq à Sept clothing pieces with ‘iron-on’ floral crystal decals.

She expressed excitement to her 45million followers over the fact that ‘stretchy dark denim with iron on crystals is back’ in style.

‘Thank you gen z for your contribution to bringing back my middle school dream clothes,’ captioned Lively.

She then joked that the double denim getup takes her back to her teen years with BFF Brittney Smith.

‘In this outfit I emotionally have braces on & am sobbing to @norahjones with my best friend @brittneynicole____ bc our crush doesn’t know we exist but it’s ok bc we have such cute crystal jeans on that my mom found on sale at Rampage for us,’ she wrote.

Lively added: ‘Matching of course, [because] we thought it was [fire]’

She looked sensational in her Y2K-inspired outfit that showed off her killer frame — less than a year and a half after giving birth to her fourth child.

Lively’s lustrous golden curls were swept over one shoulder and flowed down to her waist.

As for her makeup, the Age Of Adaline star sported sultry smokey brown eyeshadow and a glossy lip for the promo photos.

She posed up against a lovely rustic backdrop with her hunky co-star Brandon Sklenar.

It Ends With Us is a film adaptation of the Colleen Hoover romance novel of the same name.

‘Lily (Lively) overcomes a traumatic childhood to embark on a new life. A chance meeting with a neurosurgeon (Justin Baldoni) sparks a connection but Lily begins to see sides of him that remind her of her parents’ relationship,’ reads the official IMDb synopsis.

The Columbia Pictures film will hit theaters on Friday, August 9.

Lively has been busy promoting her new film It Ends With Us; seen in June

It Ends With Us is a film adaptation of the Colleen Hoover romance novel of the same name and is slated for an August 9 theatrical release

Lively’s husband Ryan Reynolds recently celebrated a film release of his own.

The Canadian actor, 47, returns as Deadpool in Marvel Studios’ Deadpool & Wolverine co-starring Hugh Jackman as the clawed crusader.

The third installment in the beloved Deadpool franchise premiered theatrically on Friday, July 26.

The film’s opening weekend shattered records and it has already amassed over $500million at the worldwide box office, as per Deadline.

Lively appears as Ladypool near the end of the film and the couple’s seven-year-old daughter Inez makes a surprise cameo as a character named Kidpool.

Lively and Reynolds also share daughters James, nine, and Betty, four, and baby son Olin, one.

The Hollywood couple left their brood at home as they attended the starry Deadpool & Wolverine premiere in New York City earlier this month.

For the special occasion in, the blonde beauty hit the red carpet in a sexy red Deadpool-inspired catsuit.

Reynolds looked dapper in a fitted black suit and white dress shirt as he wrapped an arm around his wife of 12 years.

Lively’s husband Ryan Reynolds recently celebrated a film release of his own; seen on July 22

The Canadian actor, 47, returns as Deadpool in Marvel Studios’ Deadpool & Wolverine co-starring Hugh Jackman as the clawed crusader

The Hollywood couple attended the starry Deadpool & Wolverine premiere in New York City earlier this month; seen on July 22

Lively’s latest Instagram post comes amid speculation that she’s preparing to launch her very own beauty brand.

The buzz first began when fans discovered a mysterious Instagram account called Blake Brown Beauty that followed the Gossip Girl alum.

The account, which currently has more than 1,454 followers, showcases only a picture of a blonde woman popping a leather collar from behind, with her hair in a bun.

Lively has yet to make the announcement on her own Instagram account, where she has 45 million followers, however, she is following the account.

Multiple Blake fan accounts have already started following along and commenters were crazed, promising to buy whatever items she’s going to sell.