The Duchess of Sussex turned 42 on Friday. Meghan Markle was born on August 4, 1981 in Los Angeles. The Duchess of Sussex celebrated her 42nd birthday at her home in Montecito. Ahead of her birthday, the Duchess attended a dinner with husband Prince Harry at local restaurant Tre Lune in Montecito Wednesday night. The Duchess of Sussex wore a black-and-white striped tube dress from the brand Posse.