A teenager named Tristin Budzyn-Baker found the actor's wallet in a Los Angeles eatery and, on realising it really did belong to Chris Hemsworth, told his mother: "Do you know who this is? We found Thor's wallet."
Tristin, who appeared on The Ellen DeGeneres Show along with the actor on Monday, added: "We were speechless. We did not know what to do."
Chris, who expected to receive an empty wallet, handed over the wad of money and some "extra cash" to Tristin on the show. Tristin quipped: "It's empty now." He also received a bunch of other rewards, including $10,000 from image publishers Shutterfly.
What else did Thor do? He wrote Tristin, who is a Boy Scout, a letter of appreciation to help him achieve Eagle Scout rank.