“Being a parent and imagining the conditions and the poverty that many of the children are living with in the world, it seems insane to not do everything you can to support initiatives like this,” said Sienna Miller at last night’s launch of UNICEF’s Project Lion. The campaign serves to protect and improve the lives of hundreds of thousands of children in India and is the brainchild of Miller’s friends Purvi and Harsh Padia. Joining the English actress—who was dressed in a sleek slip dress designed by her sister, Savannah—was her mother, Josephine, and her cohost, Today anchor and former First Daughter Jenna Bush Hager.