Britain's royal family is gathering at Westminster Abbey to mark the 60th anniversary of the coronation of Queen Elizabeth II. Elizabeth, now 87, was crowned in the abbey on June 2, 1953, in a ceremony laden with 1,000 years of tradition. Her children and grandchildren are among 2,000 people attending Tuesday's anniversary gathering which will also be attended by Prime Minister David Cameron. The jewel-encrusted, golden St. Edward's Crown will sit on the altar - the first time it has left the Tower of London since the 1953 coronation, according to a report of the Associated Press. The queen's 91-year-old husband, Prince Philip, pulled out of an event Monday evening because of illness but is expected to attend the gathering.