Kat Dennings wowed at the world premiere of "Thor: The Dark World" in London last night (Oct. 22), giving the film's female star, Natalie Portman, a run for her money.


Dennings rocked a low-cut gown by Lanvin as she posed on the red carpet. The velvet and gold dress suited her old Hollywood style, which was accentuated with a bold red lip.


The 27-year-old actress was joined by co-stars Portman, Chris Hemsworth, Tom Hiddleston, Stellan Skarsgard and Idris Elba. (Quite the good looking bunch!)


See Kat's "Thor" look below:


kat dennings


kat dennings


kat dennings



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  • Los Angeles Premiere of "Thor"


    Kat Dennings Los Angeles Premiere of "Thor" El Capitan Theater Hollywood, CA 5/2/11 ©Jill Johnson/jpistudios.com 310-657-9661




  • In this image released by CBS, Kat Dennings, left, and Beth Behrs are shown in a scene from the comedy series "2 broke Girls," premiering Sept. 19, 2011 on CBS. (AP Photo/CBS, Richard Cartwright)




  • Kat Dennings


    Kat Dennings arrives at the 64th Primetime Emmy Awards at the Nokia Theatre on Sunday, Sept. 23, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)




  • 64th Primetime Emmy Awards Arrivals


    Kat Dennings 64th Primetime Emmy Awards Arrivals at Nokia Theatre L.A. Live on September 23, 2012 Los Angeles, California 9/23/12 © J. Graylcok/jpistudios/com 310-657-9661




  • 64th Primetime Emmy Awards Arrivals


    Kat Dennings 64th Primetime Emmy Awards Arrivals at Nokia Theatre L.A. Live on September 23, 2012 Los Angeles, California 9/23/12 © Jill Johnson/jpistudios/com 310-657-9661




  • CW, CBS and Showtime 2012 Summer TCA party


    Kat Dennings CW, CBS and Showtime 2012 Summer TCA party The Beverly Hilton Hotel Beverly Hills, California 7/29/12 © Jill Johnson/jpistudios.com 310-657-9661




  • CW, CBS and Showtime 2012 Summer TCA party


    Kat Dennings CW, CBS and Showtime 2012 Summer TCA party The Beverly Hilton Hotel Beverly Hills, California 7/29/12 © Jill Johnson/jpistudios.com 310-657-9661




  • Kat Dennings, Beth Behrs


    "2 Broke Girls" co-stars Kat Dennings, left, and Beth Behrs attend the CBS network upfront presentation at The Tent at Lincoln Center, Wednesday, May 16, 2012 in New York. (AP Photo/Evan Agostini)




  • Trevor Projects 2011 Trevor Live


    Kat Dennings Trevor Projects 2011 Trevor Live Hollywood Palladium Hollywood, CA 12/04/11 © Jill Johnson/jpistudios.com 310-657-9661




  • Kat Dennings


    Kat Dennings poses for a photo as she promotes her new film "Daydream Nation" during the Toronto International Film Festival in Toronto on Friday Sept. 10, 2010. (AP Photo/The Canadian Press, Chris Young)




  • 2011 CBS Upfront Presentation


    Kat Dennings 2011 CBS Upfront Presentation Lincoln Center New York, NY 5/18/11 © Jennifer Graylock/jpistudios.com 310-657-9661