Kate Beckinsale Looks Unrecognizable After Debuting Blonde Bob Hair Transformation

Do blondes have more fun?

Kate Beckinsale seems to be seeing if that's the case, as she recently switched up her signature style of long brunette tresses for a dramatic blonde bob hairstyle. The Underworld actress debuted her dramatic transformation at the Roger Vivier holiday dinner on Dec. 6 in Los Angeles.

For the festive event, Kate sleighed in a vibrant red power suit that she paired with a coordinating bustier and sky-high pleaser heels. She also matched her makeup to her outfit, wearing a bright crimson-colored lipstick, courtesy of makeup artist Jose Corella.

And while the 50-year-old donned a statement-making getup, she also made sure all eyes were on her new shoulder-grazing 'do. 

Hairstylist Dimitris Giannetos—who cut, colored and styled the actress' hair— gave Kate voluminous, textured waves and a deep side part. Her bombshell look perfectly complemented her sultry attire.

Before taking the plunge and going blonde, Kate turned heads at Elle's 2023 Women in Hollywood event on Dec. 5 with a glamorous look. She pinned her honey brown locks in a curly updo, which kept the focus on her black long-sleeve dress that featured colorful jewel embellishments and sexy side cutouts.

Of course, Kate's bejeweled look was a subtle version of the epic Titanic-inspired dress she wore to Leonardo DiCaprio's 49th birthday bash last month.

At the time, the Pearl Harbor star stole the spotlight in a little black dress that featured a diamond embellishments on the neckline and a gigantic blue sapphire gem on the waist—which fans compared to the Heart of the Ocean necklace in Leo's iconic 1997 film.

And no detail went unnoticed, either. She styled her eye-catching outfit with sheer tights, black stilettos and a massive bow hair accessory.

Kate isn't the only celebrity who has pushed the beauty boundaries. Keep reading to see all of the jaw-dropping hair transformations in recent months.

The Underworld actress took the plunge and went full blonde, while also debuting a short bob haircut.

The Daisy Jones & The Six actress debuted jet-black hair on Nov. 2.

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.

The Flamin' Hot director recently showcased her dramatic transformation, debuting a choppy, layered bob on Nov. 9.

The TikToker debuted a fresh haircut, revealing a long bob.

After rocking platinum blonde tresses for years, Miley officially returned to her brunette roots to model Gucci's new collection.

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.

The supermodel debuted a punk-rock hairstyle at Vogue's World Show during London Fashion Week on Sept. 14

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.