22 Years Ago, Rachel McAdams Made An Astounding Hollywood Breakthrough With Two Surprisingly Different Roles

With acting credits spanning nearly a quarter of a century, Rachel McAdams is a veteran actress today. She has proven her caliber as a leading lady over the years, and it’s always a joy to watch a Rachel McAdams movie because she still has the charm that earned her the title of Hollywood’s new ‘It Girl’ about two decades ago.

Before she became a household name, Rachel McAdams starred in the Canadian sitcom Slings & Arrows, and you can spot the talent there that would later make her one of the most recognizable faces in Hollywood. Despite being such a famous actress and earning the widespread love and adoration of fans, McAdams remains considerably underrated, especially in the past decade.

For a versatile performer like McAdams, it feels simultaneously sobering and impressive to realize that she’s a successful actress most famous for her breakout roles. The cultural footprint of her two breakout performances in the same year can’t be debated as they have defined the actress’ legacy, although her career proves that her acting range is often underappreciated in Hollywood.

Rachel McAdams Made Her Hollywood Breakthrough In 2004

Rachel McAdams starred in Nick Cassavetes’ adaptation of Nicholas Sparks’ most famous novel, The Notebook, as Allie Hamilton, the same year that she starred in Mark Waters’ high school teen drama, Mean Girls, as Regina George. The roles have nothing in common, and if Rachel McAdams weren’t so recognizable, you’d be forgiven for not realizing that she plays both characters.

The Notebook is a romantic drama about star-crossed lovers, Allie Hamilton and Noah Calhoun (Ryan Gosling), whose love story is filled with turmoil and even survives the separation created by the Second World War. Now in their old age, Allie is a patient of Alzheimer’s and Noah is reading their story, which is why the film is told in flashback.

Mean Girls follows North Shore High School newcomer Cady Heron (Lindsay Lohan) as she quickly goes from a social outcast to a trusted member of the most elite clique of girls in the school, The Plastics, led by Regina George. With memorable cultural references, one-liners, and fashion moments, Mean Girls is often considered the best teen movie of all time.

Regina George Is Still A Cultural Icon 22 Years Later

Ask anyone who grew up in the 2000s and 2010s, and they will be able to quote you back at least one Regina George line from Mean Girls. McAdams doesn’t just embody the coldness with which Regina rules over her group like an empress, but elevates the character to a level where caricature is suggested without ever being explicitly mentioned.

Even in 2025, 21 years after the movie’s original release, the fandom’s tradition of rewatching Mean Girls on October 3 was going strong. Part of the film’s cultural footprint is McAdams’ performance as the alpha Plastic. Her wardrobe still inspires Halloween costumes today, and Regina George is still her most famous character, which permanently transformed the writing of teenage characters.

The Notebook Changed How The World Perceived Rachel McAdams

One of the funniest niche aspects of her longstanding career in Hollywood is Rachel McAdams’ pattern of playing the love interest of a time-traveler, which she has coincidentally done five times already. While the specific sci-fi aspect is what makes this a particularly bizarre coincidence, it isn’t surprising that McAdams has starred in multiple romance films as the lead actress.

The Notebook proves her ability to bring romantic tension to life through subtle performance tics and with her expressive eyes. Allie Hamilton’s actions are questionable, and Noah’s romance with her hasn’t aged well, but McAdams’ performance almost makes you forget your moral standards. Her charisma made her an overnight sensation, and she soon became the best pick for romance films.

Rachel McAdams’ Later Work Has Further Proven Her Versatility

Rachel McAdams followed up her performance in one of the most romantic movies of the century and possibly the most famous high school movie with a role in Wes Craven’s 2005 crime thriller, Red Eye, opposite Cillian Murphy. It is a tense film that doesn’t let up until the climax where the two main characters have a memorable physical altercation.

She was a part of the ensemble cast in Kevin MacDonald’s 2010 mystery thriller, State of Play, took on the role of Irene Adler in Guy Ritchie’s Sherlock Holmes duology, played a bold lesbian role opposite Rachel Weisz in Disobedience, led the ensemble of 2018’s action-comedy Game Night, and of course, starred in the 2016 Best Picture Oscar winner, Spotlight.

Rachel McAdams’ Latest Movie Also Proves Her Longevity As An Actress

McAdams’ latest movie, her second time working with Sam Raimi, is her first horror film, proving she’s still evolving as an actress. She stars in 2026’s Send Help as a mistreated corporate employee with deep knowledge of the wilderness, who uses her skills to leverage power over her problematic boss after they’re stranded on an island following a plane crash.

22 years after she took the world by storm with her most famous roles, Rachel McAdams is still a dependable lead actress who can adapt to any genre. The reviews of Send Help unanimously praise her performance. It’s obvious that the range she displayed in her breakthrough roles in The Notebook and Mean Girls has only grown over the years.