Clarence House is a royal residence in London, situated on The Mall, in the City of Westminster. It is attached to St. James's Palace and shares the palace's garden. For nearly 50 years, from 1953 to 2002, it was home to Queen Elizabeth The Queen Mother. It has since been the official residence of the Prince of Wales and the Duchess of Cornwall. Clarence House also served as the official residence for Prince William from 2003, until his marriage in April 2011, and for Prince Harry from 2003 until 2012.