In this photo released by Royal Windsor Horse Show on Wednesday, April 20, 2022 and taken in March 2022, U.K.'s Queen Elizabeth II poses for a photo with her Fell ponies Bybeck Nightingale, right, and Bybeck Katie on the grounds of Windsor Castle in Windsor. Queen Elizabeth II is marking her 96th birthday privately on Thursday, retreating to the Sandringham estate in eastern England that has offered the monarch and her late husband, Prince Philip, a refuge from the affairs of state. (henrydallalphotography.com/Royal Windsor Horse Show via AP)