She may be well into her pregnancy, but that didn't stop Reese Witherspoon from bringing her A game on the red carpet Monday night.

The expectant actress was stunning in a floor-length navy gown as she promoted her forthcoming flick "Mud," alongside Matthew McConaughey.

Witherspoon, who is glowing in her second trimester, was among the hordes of celebrities who turned out for the Cannes Film Festival -- and the "Sweet Home Alabama" sweetheart was rubbing elbows with the best of them. The actress and husband Jim Toth supported friend Nicole Kidman at a special dinner feting Kidman's new film, 'The Paperboy."

Check out Witherspoon's revealing look below:
reese witherspoon baby bump

reese witherspoon baby bump

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  • Kelly Osbourne

  • Shaun Robinson

  • Tina Fey

  • Anna Faris

  • Sofia Vergara

  • Claire Danes

  • Jennifer Westfeldt

  • Lauren Parsekian

  • Christina Hendricks

  • Sofia Vergara

  • Kate Hudson

  • Jessica Simpson

  • Salma Heyek

  • Lady Gaga

  • Taylor Swift

    LOS ANGELES, CA - JANUARY 09: Singer Taylor Swift attends the 39th Annual People's Choice Awards at Nokia Theatre L.A. Live on January 9, 2013 in Los Angeles, California. (Photo by Michael Buckner/Getty Images for PCA)

  • Lady Gaga

  • Olivia Munn

  • Lea Michele

    (Getty)

  • Kat Dennings

  • Jennifer Love Hewitt

    (Getty)

  • Blake Lively

    (Getty)

  • Reese Witherspoon

    (Getty)

  • Hayden Panettiere

    (Getty)

  • Halle Berry

    (Pacific Coast News)

  • Rihanna

    (FilmMagic)

  • Elizabeth Banks

    (Getty)

  • Jennifer Lawrence

  • Miley Cyrus

    (Getty)

  • Rumer Willis

    (Getty)

  • Rose McGowan

    (Getty)

  • Reese Witherspoon

    (AP)

  • Christina Hendricks

  • Sofia Vergara

  • Eva Longoria

    (Eva Longoria, Twitter)

  • Kristin Chenoweth

  • Jennifer Love Hewitt

  • Jessica Simpson

  • Nicole Scherzinger

  • Scarlett Johansson

  • Kim Zolciak

  • Kendra Wilkinson

  • Mariah Carey

  • Heidi Montag

  • Jennifer Lopez

  • Jenny McCarthy

  • Megan Fox

  • Holly Madison

  • Anna Kournikova

  • Pamela Anderson

  • Katy Perry

  • Olivia Munn

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