Merton Police are hoping to reunite a princess with her rightful owner.

While out patrolling Wimbledon, a "noble knight" bestowed upon them Princess Peachy Shimmershine, a unicorn that had gone missing.

Along with a Peter Rabbit backpack, there is a hat with the name “Augusta Mansouri” inside.

"Princess Peachy Shimmershine is looking for her bestest friend in the world to be located as she doesn’t know where her magic castle is," the police wrote.

"Please help in locating her owner and making sure Princess Peachy Shimmershine can be returned safe and snuggly."