Meghan Markle toasted her husband Prince Harry's 41st birthday with plenty of fanfare - and a throwback photo. "Oh hi, Birthday Boy ," Meghan, 43, captioned an Instagram post on Monday, September 15. She shared an image of Harry in his military uniform from his time in active duty. Meghan previously marked her spouse's milestone birthday last year with a blowout bash at their Montecito, California mansion. Harry and Meghan have been married since 2018, going on to welcome son Prince Archie in 2019 and daughter Princess Lilibet in 2021.