Harry and Meghan 'privately congratulated' William and Kate for their tenth anniversary 3 May, 2021 08:37 PM 3 minutes to read William and Kate have been married since April 29, 2011. Video / AP / Getty NZ Herald Meghan and Harry joined in celebrating Kate Middleton and Prince William's tenth wedding anniversary last week - but they chose to send their well wishes privately. People confirms that the Duke and Duchess of Sussex "privately" congratulated William and Kate on the special milestone. Prince William and Kate Middleton married on April 29, 2011, at London's Westminster Abbey, where Harry stood up as his older brother's best man. Queen Elizabeth and Prince Charles also shared their well wishes for Kate and William on their special day on social media.