Instagram/Leonardo DiCaprio & David Celebrity Join Leonardo DiCaprio and global icons in celebrating Sir David Attenborough's 100th birthday with a heartfelt tribute to his legacy as a storyteller and en... May 9, 2026 AceShowbiz - Leonardo DiCaprio has paid a warm tribute to David Attenborough on the occasion of his 100th birthday. The acclaimed actor and environmental advocate shared a heartfelt message on Instagram, joining a host of celebrities and even royalty in celebrating the milestone of the legendary naturalist.