Jessica Biel Reveals Black Underwear Under Sheer Dress

After spending the past two months promoting the A-Team movie around the globe, Jessica Biel should be a seasoned red carpet veteran.

Justin Timberlake's girlfriend, 28, was credited with bringing the glamour to the premiere in her Giambattista Valli gown and her matching red strappy sandals.

However, she managed to commit two fashion faux pas as she wore an outfit the same colour as the carpet, and managed to flash her black underwear in the process.