Hilary Swank wearing a backless navy Guy Laroche dress, Oscars, 2005. She won 'Best Actress' for 'Million Dollar Baby'. White Backless Tie back Ruched Dress AROLORA Hilary Swank dazzled in a captivating navy blue Guy Laroche backless dress at the 77th Academy Awards on February 27, 2005. Recognized as the 16th greatest red carpet gown in a Debenhams White Halter Maxi Dress Backless Plunge V Neck Formal Gown High Slit Evening & Wedding Guest Dress Summer Resort Wear Kouvr Fashion Calanta Gown At the Vanity Fair Oscar Party, Julia Garner wore a custom Gucci gown designed with all over embroidered fringe and delicate feather detailing, complete with a halter neckline and open back silhouette.