Royal couple Kate Middleton and Prince William stepped out in their finest black-tie attire tonight for Our Greatest Team Rises Gala dinner at London's Royal Albert Hall. The event brought England's Olympic hopefuls together with former Olympic athletes as the country inches closer to the 2012 Summer games. This is the second major public appearance for Kate and William this week after attending a dinner with the Thirty Club on Tuesday night. For that occasion, Kate chose a white gown from Roland Mouret; however, tonight she modeled a design from one of her favorite British designers, Jenny Packham, embellished with elaborate lace and button details down the back. Kate managed to slip away from the limelight last week when she and her dog Lupo joined a group of scouts on a camping trip.