Queen Elizabeth II turns 90

Royal supporters pose outside Windsor Castle as Britain’s Queen Elizabeth II celebrates her 90th birthday on April 21.

A puppy peers through the bunting outside Windsor Castle on the queen’s birthday.

Royal fans gather with placards, flags and balloons as they wait for Britain’s Queen Elizabeth II to start a walk in Windsor to celebrate her 90th birthday.

A royal supporter celebrates outside Windsor Castle as Britain’s Queen Elizabeth II turns 90 on April 21.

Queen Elizabeth II poses with her daughter, Princess Anne, at Windsor Castle -- one of three official photos celebrating the queen’s 90th birthday.