The two singer-songwriters became friends last year (16), during Ed's year off and Blunt was at a party with the Lego House star when he was nicked on the face by a sword.

Reports suggest British royal Princess Beatrice was attempting to 'knight' Blunt when she lifted the blade and accidentally caught Sheeran, who now sports a scar as a result of the mishap.

Ed has confirmed the party accident but refuses to name names.

And now he and Blunt will be able to relive the moment the princess almost took his eye out on the road.

A source tells The Sun, "Ed and James have a real laugh together, it’ll be proper madness on tour. James has a good following in the U.S. so he’ll also play some gigs too, acting as a support for his mate."

The pals are also working on new material for James’ new album.

Sheeran will confirm dates for his U.S. tour soon.