It Ends With Us is starting off with a fiery reveal.
Blake Lively unveiled her latest hair transformation in the first photos of the upcoming movie adaptation of Colleen Hoover's best-selling novel.
Playing redheaded florist Lily Bloom, the actress stepped out with a new red 'do on the New York City set on May 15. Blake also rocked a bright fuchsia jacket over a pastel pink tee and long brown dress as she filmed on a sidewalk.
At one point in the day, the 35-year-old ditched her rose-colored tops to reveal her frock's halterneck detail for a scene with co-star Justin Baldoni, who plays her love interest Ryle Kincaid in addition to serving as the movie's director.
Blake's half-sister Robyn Lively was also spotted on set, though it's unclear if she was there visiting or as a part in the film.
Additional casting details for the highly anticipated flick has been very hush-hush, though it was announced last month that 1923 actor Brandon Sklenar will be playing Atlas Corrigan, Lily's old flame and childhood friend.
"Though coming from a complicated past, Lilly Bloom has always known the life she wants," the film's synopsis read at the time of the casting news. "While living in Boston, she meets neurosurgeon Ryle Kincaid and believes she may very well have found her soul mate. Soon, however, questions arise about their relationship, and to complicate matters her high school love interest, Atlas Corrigan, comes back into the picture, putting her relationship with Ryle in jeopardy."
Neither Blake or Justin—who are also executive producers of the movie—have revealed who will be playing young Lily. However, Justin confirmed on April 19 that they have found their star following an extensive search that included an open casting call on social media.
"Thank you for being a part of the process, it was inspiring and all of the messages we received was just validation for why we're making this movie and why this movie is so important," he shared on Instagram. "We found our young Lily, we'll be announcing her soon."
First published in 2016, It Ends With Us gained popularity in recent years thanks to book lovers on TikTok. A sequel to the novel, titled It Starts with Us, was released last October.
This is not the first time Blake has been involved in bringing a book to life. Most notably, she played Serena van der Woodsen on the TV adaption of Cecily von Ziegesar's Gossip Girl novel series from 2007 to 2012.
She also starred in 2018's A Simple Favor, which was based on the Darcey Bell book of the same name. A follow-up to the dark comedy is currently in development.
"I've actually read the script now," actress Courtney Lopez told E! News in January, "and it's so good."
Release dates for It Ends With Us and A Simple Favor's sequel have yet to be announced.
For now, see Blake's Lily Bloom-inspired fiery locks—as well as more celeb hair transformations—below.
Riley Keough
The Daisy Jones & The Six actress debuted jet-black hair on Nov. 2.
Rihanna
While enjoying a dinner date with friends on Nov. 9, Rihanna debuted honey blonde hair. After years of rocking black tresses, the superstar decided to switch up her style for something brighter.
Eva Longoria
The Flamin' Hot director recently showcased her dramatic transformation, debuting a choppy, layered bob on Nov. 9.
Alix Earle
The TikToker debuted a fresh haircut, revealing a long bob.
Miley Cyrus
After rocking platinum blonde tresses for years, Miley officially returned to her brunette roots to model Gucci's new collection.
Kate Middleton
The royal recently showed off her new curtain bangs during a public appearance on Sept. 27.
The actress recently debuted a bright red hair color and equally bold blunt bob haircut.
Cara Delevingne
The supermodel debuted a punk-rock hairstyle at Vogue's World Show during London Fashion Week on Sept. 14
Brittany Snow
The Pitch Perfect star made a drastic hair change, going from dark brunette tresses to a bright blonde look.
The Scream actress debuted a bubblegum pink style in August 2023.
The son of David Beckham and Victoria Beckham got his head shaved by Selena Gomez's little sister, Gracie Teefey, in August 2023.
The Can't Hardly Wait actress showed off her drastic hair change, debuting dark red hair and a blunt bob haircut.
The Second Act star unveiled bright blonde highlights in a new selfie.
The Kardashians star showed off her new bob hairstyle in a recent SKIMS video campaign.
The Hustlers star debuted a voluminous long bob and curtain bangs on Aug. 12.
Rachel Green, is that you? The Euphoria star appeared to take inspiration from Jennifer Aniston's Friends character with this layered look.
The Vanderpump Rules star debuted a platinum blond dye job in August 2023.
The '90s heartthrob debuted a newly shaved head, sharing on Instagram that "it's for work."
The "Say So" singer showed off her dramatic hair transformation on Instagram, debuting bright purple hair and a spooky spider design on the back of her head.
The Kick-Ass actress debuted a fresh bob haircut, which she hasn't rocked in quite some time.
The American Idol judge revived her signature style of 2008 and revealed baby bangs in a June 20 Instagram.
In July 2023, the SKIMS founder debuted a short bob, bringing to mind what has become her sister Kourtney Kardashian's signature style in recent years.
The Vampire Diaries actress debuted fringe bangs for the Los Angeles premiere of her new film Out-Laws in June.
The "Vogue" singer debuted an edgy shag haircut on June 11.
The Dance Moms alum proved you can be blonde and brunette at the same time with her recent hair change.
The High School Musical alum has entered her French girl era, after showing off her new curtain bangs.
The New Girl alum ditched her trademark brown hair and blunt bangs for a sky-high blonde 'do for her upcoming appearance on the '80s-based Apple TV+ series Physical.
The "Over It" artist headed into summer with a shorter cut and new hair color, debuting her blonde bob to Instagram in May 2023.
The X-Men star kissed her shoulder-length hair goodbye and debuted a pixie cut on May 26.
While attending the Louis Vuitton cruise show in Italy on May 24, Emma debuted curtain bangs—a style she often rocked in the mid-2010s.