Kate Middleton Post-Baby Pictures: Duchess of Cambridge Stuns In Jenny Packham Dress at Red Carpet Debut (Photo, Video)

Sep 13, 2013 01:12 PM EDT

Kate Middleton returned to the spotlight as she made her first red carpet appearance since giving birth to Prince George at the Tusk Conservation Awards at The Royal Society in London on Thursday, Sept. 12.

The gorgeous new mom, who welcomed her royal bundle of joy in July, wearing a stunning, custom-made Jenny Packham dress that accentuated her post-baby figure.

Speaking to the crowd during the awards, William joked about being a new dad. "As you might have gathered, Catherine and I have recently become proud parents -- of a baby who has a voice to match any lion's roar!" he said. "This is actually our first evening out without him, so please excuse us if you see us nervously casting cheeky glances at our mobile phone to check all is well back home."

Prince William recently finished his final flyboy shift as a search-and-rescue- helicopter pilot to focus on his dad duties and other obligations. He is a patron of the Tusk Conservation charity.