There's a new Mr Men stamp collection that will make you actually want to send letters

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Special occasion Royal Mail stamps can be hit and miss, but this time they've hit the nail right on the head - or perhaps hitting Mr Bump on the head would be a more apt metaphor.

That's right, the postal service is issuing Mr Men and Little Miss stamps. Here's what author and illustrator Adam Hargreaves, son of Roger Hargreaves the creator of theĀ children's books, thinks about the tribute:

Royal Mail will release 10 stamps to mark the 45th anniversary of the books.

In case you aren't aware, the children's book series follow the stories of characters with a specific character trait that defines them, for example Mr Happy, Mr Grumpy or Little Miss Naughty.

Mr Tickle stamp
Mr Tickle was the first in a series of characters created by Roger Hargreaves (Royal Mail/PA)

The first book was made after Adam asked his father what a tickle looked like - thus Mr Tickle, a small orange character with long arms, was born.

Since 1971 there have been 50 Mr Men and 36 Little Miss books published, with Adam taking over after his father died in 1988.

The Mr Men and Little Miss stamp collection
The full roster of characters on the new stamps include Mr Messy, Little Miss Princess and Mr Strong (Royal Mail/PA)

"I feel incredibly proud and I think my father would have been equally proud and really chuffed," said Adam. "It's a real accolade for the Mr Men and Little Miss characters to be on a Royal Mail stamp."

Philip Parker of the Royal Mail said: "The Mr Men and Little Miss characters are a worldwide phenomenon. People identify with the different character traits, and we hope these stamps will brighten up the sending and receiving of mail."

Little Miss Christmas stamp
The Little Miss Christmas stamp should become pretty handy in a couple of months (Royal Mail/PA)