Rachel McAdams should stay single forever because she's never looked better.

The Canadian actress debuted a fiery new 'do at the premiere for her new film "About Time" in London on Thursday.

"The Notebook" star, who split up with "Midnight in Paris" actor Michael Sheen in February, was practically glowing in a flowing white-lavender Roksanda Illincic gown which featured a funky hologram belt and lime green stripe down the back. (If only Ryan Gosling could see her now...)

We love to gush over one of our favourite Canucks as much as we can; not only is the 34-year-old beautiful and a talented actress but the former one-half of McGosling is also down to earth (she prefers to live in Toronto rather than Los Angeles) and can play a fantastic mean girl.

One of the other great qualities about our girl crush is that McAdams can pull off basically any hair colour. Seriously, she looks great as a redhead, as a bright blond, with pink highlights and as a brunette.

Keep being you, Rachel!

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  • Rachel McAdams

    Actress Rachel McAdams attends the 'About Time' world premiere at Somerset House on August 8, 2013 in London, England. (Photo by Gareth Cattermole/Getty Images for Universal Pictures)

  • Rachel McAdams

    Actress Rachel McAdams attends the 'About Time' world premiere at Somerset House on August 8, 2013 in London, England. (Photo by Gareth Cattermole/Getty Images for Universal Pictures)

  • World Premiere Of About Time

    LONDON, ENGLAND - AUGUST 08: Actress Rachel McAdams attends the 'About Time' world premiere at Somerset House on August 8, 2013 in London, England. (Photo by Gareth Cattermole/Getty Images for Universal Pictures)

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    Actress Rachel McAdams arrives at the premiere of "To The Wonder" hosted by FIJI Water on Tuesday, April 9, 2013 in Los Angeles. (Photo by Matt Sayles/Invision for Fiji Water/AP Images)

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    Actress Rachel McAdams attends the 'To The Wonder' premiere during the 2012 Toronto International Film Festival at the Princess of Wales Theatre on September 10, 2012 in Toronto, Canada. (Photo by Jason Merritt/Getty Images)

  • Rachel McAdams

    Actress Rachel McAdams attends the premiere of Sony Pictures' 'The Vow' at Grauman's Chinese Theatre on February 6, 2012 in Hollywood, California. (Photo by Alberto E. Rodriguez/Getty Images)

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    Actress Rachel McAdams arrives at the premiere of Warner Bros. Pictures' 'Journey 2: The Mysterious Island' at the Chinese Theater on February 2, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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    Actress Rachel McAdams attends the Los Angeles premiere of 'Sherlock Holmes: A Game Of Shadows' at Regency Village Theatre on December 6, 2011 in Westwood, California. (Photo by Jason Merritt/Getty Images)

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    Actress Rachael Mcadams attends The Cinema Society & Thierry Mugler screening after party for 'Midnight in Paris' at the Soho Grand Hotel Club Room on May 17, 2011 in New York City. (Photo by Stephen Lovekin/Getty Images)

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    Actress Rachel McAdams attends The Cinema Society & Thierry Mugler screening of 'Midnight in Paris' at Tribeca Grand Screening Room on May 17, 2011 in New York City. (Photo by Stephen Lovekin/Getty Images)

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    Canadian actress Rachel McAdams poses on the red carpet before the screening of 'Sleeping Beauty' presented in competition at the 64th Cannes Film Festival on May 12, 2011 in Cannes. AFP PHOTO / ANNE-CHRISTINE POUJOULAT (Photo credit should read ANNE-CHRISTINE POUJOULAT/AFP/Getty Images)

  • Rachel McAdams

    Actress Rachel McAdams attends the opening night dinner during the 64th Annual Cannes Film Festival at Palais des Festivals on May 11, 2011 in Cannes, France. (Photo by Pascal Le Segretain/Getty Images)

  • Rachel McAdams

    Actress Rachel McAdams attends the 'Midnight In Paris' photocall at the Palais des Festivals during the 64th Cannes Film Festival on May 11, 2011 in Cannes, France. (Photo by Ian Gavan/Getty Images)

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    Actress Rachel McAdams attends the Photocall for the' Morning Glory' film at Hotel Meurice on January 14, 2011 in Paris, France. (Photo by Pascal Le Segretain/Getty Images)

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    Actress Rachel McAdams attends the 'Morning Glory' UK premiere at the Empire Leicester Square on January 11, 2011 in London, England. (Photo by Ian Gavan/Getty Images)

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    Canadian actress Rachel McAdams poses on the red carpet prior to the premiere of the movie Morning Glory in Berlin, January 9, 2011. AFP PHOTO/ODD ANDERSEN (Photo credit should read ODD ANDERSEN/AFP/Getty Images)

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    Actors Jeff Goldblum, Rachel McAdams and Patrick Wilson attend the New York Premiere of 'Morning Glory' at Ziegfeld Theatre on November 7, 2010 in New York City. (Photo by Neilson Barnard/Getty Images)

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    Actor Ryan Gosling (L) and actress Rachel McAdams arrive at the 13th Annual Screen Actors Guild Awards held at the Shrine Auditorium on January 28, 2007 in Los Angeles, California. (Photo by Frederick M. Brown/Getty Images)

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    Actors Rachel McAdams (L) and Ryan Gosling arrive at the 12th Annual Critics' Choice Awards held at the Santa Monica Civic Auditorium on January 12, 2007 in Santa Monica, California. (Photo by Stephen Shugerman/Getty Images)

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    Actors Ryan Gosling and Rachel McAdams winners of Best Kiss for 'The Notebook' pose backstage during the 2005 MTV Movie Awards at the Shrine Auditorium on June 4, 2005 in Los Angeles, California. The 14th annual award show will premiere on MTV Thursday, June 9 at 9:00PM (ET/PT). (Photo by Frederick M. Brown/Getty Images)

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    Actors Ryan Gosling (left) and Rachel McAdams arrive at the premiere of New Lines' 'The Notebook' on June 21, 2004 at the Village Theatre, in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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