WWII veteran Capt. Tom Moore became one of Britain's most beloved residents a few weeks ago, when he raised millions for the nation's health care workers by walking laps in his backyard. The 100-year-old has now received more than 125,000 birthday cards from fans, according to BBC News. His grandson, Benjie Ingram-Moore, asked his school for help with sorting the massive influx of cards when he heard the post office was getting overwhelmed. Even Prince William, Duchess Kate and England football captain Harry Kane have mailed in their well wishes.