The Duchess of Sussex turned 40 today. On the occasion of the birthday, Queen Elizabeth, The Prince of Wales and Duchess of Cornwall, and The Duke and Duchess of Cambridge shared birthday wishes on their social media accounts with various photos for The Duchess of Sussex on her 40th birthday being celebrated today. Rachel Meghan Markle was born on August 4, 1981 in Canoga Park, Los Angeles. The Duchess of Sussex is celebrating her 40th birthday at her home in Montecito.