We've all probably walked past someone at some point in our lives and wondered: "Is that who I think it is?"
That's exactly what these two joggers thought when they ran past Prince Charles, who was strolling through Green Park in London - which is close to his home, Clarence House.
You can only imagine the sheer surprise on encountering one of the most famous people on the planet.
After all, it's not every day you come almost face-to-face with British royalty on your jogging route.
The Prince of Wales was there to sow seeds for a wildflower meadow named in honour of the Queen at the park.
The heir to the throne joined school children to scatter yellow rattle flower seeds to start the new grassland as part of the Coronation Meadows campaign.