Lifestyle Style Kate Beckinsale Debuts Shocking Blonde Bob: See Her Transformation! The actress looks almost unrecognizable with the look her hairstylist has coined the "blob" By Genevieve Cepeda Genevieve Cepeda Genevieve Cepeda is a staff shopping writer for PEOPLE. She was formerly a PEOPLE beauty and style intern and wrote about style, entertainment, and arts for four years at Northwestern University. People Editorial Guidelines Published on December 7, 2023 08:39PM EST Kate Beckinsale on Dec. 6, Dec. 5 and Dec. 7. Photo: Gregg DeGuire/Variety via Getty, MICHAEL TRAN/AFP via Getty (2) Who's that girl? Kate Beckinsale is rocking a major hair transformation — and she did it seemingly overnight. On Tuesday, Beckinsale attended Elle’s Women in Hollywood celebration with her long brown hair styled in a massive messy bun. The very next day she stepped out at the Roger Vivier Holiday Dinner looking almost unrecognizable with a striking blonde bob. Skeptics who assumed Beckinsale was wearing a wig might be confused to find that the star was still looking very blonde on Thursday. Beckinsale wore her chic new look at The Hollywood Reporter’s Women in Entertainment gala in Beverly Hills, along with a white minidress. Kate Beckinsale attends The Hollywood Reporter's Women in Entertainment gala in Beverly Hills. MICHAEL TRAN/AFP via Getty Kate Beckinsale Shuts Down Plastic Surgery Claims, Says Medical Condition Keeps Her from Botox, Fillers Beckinsale gave the hairstyle its Instagram debut on Thursday, posing in the all-red look she wore at the Roger Vivier Holiday Dinner. Her hair stylist Dimitris Giannetos, who styled Beckinsale’s new look, kept it simple in the actress’s comments, writing “HOTNESS.” Giannetos also coined a new name for the look — the “blob.” Latvian designer Ramona Agruma praised Beckinsale in the comments as well, commenting “Omg! Blond looks so good on you 😍,” to which Beckinsale asked, “am I Latvian yet ?” In response, Agruma commented that Beckinsale looks “classy English 😘.” Kate Beckinsale Calls Out the 'Fairly Constant' Bullying She Gets from Men on Instagram Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories. Beckinsale was last seen with a platinum bob in her 2021 film Jolt. The actress’s hairstyle is the latest of a number of bold style moves from the star. In November, Beckinsale celebrated Leonardo DiCaprio’s birthday in a minidress resembling the sapphire necklace in Titanic. Last week, the star wore a wow-worthy sheer dress at Paris Hilton’s Slivmas party.