Blake Lively's flower power dressing has not yet diminished on the "It Ends With Us" press tour. Rather, he has become more experimental.

On Thursday, August 8, Blake Lively attended a photocall for the film held at the IET building in London: Savoy Place. The actress's look, captured on the red carpet, not only incorporated floral patterns in honor of Lily Bloom, the florist she plays in the film, but was also risqué enough to wear a topless white suit for the occasion.

Lively opted for oversized white separates and paired them with a boxy floral blazer and high-waisted wide-leg pants. The breezy coat was by Stella McCartney, one of her favorite designers this summer.

Lively, who checked homage to Lily Bloom off her fashion to-do list, took the opportunity to make a bold statement. Instead of wearing a blazer with a casual T-shirt or matching blouse, she wore no shirt at all, revealing much of her chest and midriff. She also showed a glimpse of underwear at the waist, which appeared to be sheer nude-colored stockings with a floral motif.

The Gossip Girl native styled her look with turquoise heeled sandals, green and white chunky earrings, and a large Lorraine Schwartz ring. She wore her blonde hair in loose, side-parted curls, neutral makeup, and pink lips.

Since June, Lively has been going full throttle in method dressing for the "It Ends With" press tour. She has also worn a variety of designers, including Vivienne Westwood, Dauphinette, and Christopher John Rogers.

Before flying to London, she attended the official premiere in New York wearing a vintage Versace gown, the same one Britney Spears wore to the fashion house runway show in 2002.

Lively's look on Tuesday, August 6, featured multicolored pastel sequins, floral embellishments across the waist, and an asymmetrical halter neckline. 'It's Britney's actual dress,' she said. It should be in the Smithsonian or the Met Museum. But it's mine. I feel very lucky," the actress told People at the event.

The press circuit for "It Ends With Us" has reached its final day, and the film will officially open on August 9. But it's not over until Blake Lively makes a few more floral outfits, with or without tops.