August 15, 2013 - 16:52 BST hellomagazine.com Kate Middleton will attend the Tusk Conservation Awards on 12 September with William for their first event together since becoming parents Kate Middleton will attend her first official public engagement since becoming a mother on 12 September. New parents the Duke and Duchess of Cambridge will be guests of honour at the inaugural Tusk Conservation Awards at The Royal Society, London. It will be the 31-year-old's first royal commitment since Prince George was born on 22 July. After winning fashion fans worldwide with her impeccable maternity wardrobe, Kate's style watchers will be eagerly awaiting the outfit she chooses for the event. Her husband William will present two awards, The Prince William Award for Conservation in Africa and The Tusk Conservation Award for Conservation in Africa, as well as making a short speech. Conservation work is a cause close to William's heart. The second in line to the throne spent time in Africa on his gap year working in Lewa, Kenya on a conservation project and described it as "one of the happiest times of my life". William returned to the same spot several times, most famously when he proposed to Kate in October 2010. As patron of the charity, William, his wife and their baby boy will undoubtedly be the talk of the evening. At the heart of the occasion, however, is the honouring of unsung heroes of wildlife conservation. In a new documentary which airs on CNN on 15 September, the second in line to the throne talks about his passion for Africa and conservation. The interview is part of an hour-long special titled Prince William's Passion: New Father, New Hope. The special focuses on William's love for the continent - where he chose to propose to Kate in 2010 - and his dream to save the world's most endangered species. Since the birth of her first child, the Duchess has been resting and bonding with George at her parents' Berkshire home and her and William's Anglesey farmhouse. Meanwhile, new dad William has returned to his official duties. He made his first public appearance since George's arrival on Wednesday at the Anglesey County Show. When asked about his newborn, the Prince joked that the royal baby was "pretty loud and extremely good-looking," and added that there had been "just a few sleepless nights but [George] is sleeping much better now". Addressing the crowds with a speech, the new father called Anglesey "an immensely special place for us both" and said the couple would be returning again and again with their new family . It is widely believed that Prince William will return to London from Anglesey where he can care for his new family. He will reportedly join his regiment, the Household Cavalry's Blues and Royals, which will allow him to carry out more royal engagements in support of the Queen.