Rupert Grint has joked that Ed Sheeran is his alter ego

In the video clip, Rupert is preparing himself to sing when he breaks away and admits: "The truth is, Ed isn't real!"

The 28-year-old actor subsequently rips open his blue plaid shirt - which has become synonymous with the real-life Ed - and reveals a Gryffindor top from the 'Harry Potter' series.

The flame-haired star explains: "My name is Rupert Grint. After Potter all I wanted to do was stretch myself ... create some real magic.

"So I created a character. He had the voice of an angel ... and possible wispy facial hair, a guitar, a bunch of flannel. I call him Ed. Ed Sheeran. Such a weird name, right?"

Rupert's on-stage antics are met with screams of denial from the watching audience.

But the actor continues: "I didn't expect everyone to think he was real. He became my best achievement and bane of my existence."

Then, the show's host asks Rupert: "Was anything real? The adorable klutziness, cat photos?"

And the British actor responds: "I hate cats! I can't balance it anymore. Ed is no more!"

Earlier this month, Rupert - who starred in the video for Ed's 2011 single 'Lego House' - admitted being mistaken for the 'Shape of You' hitmaker has become part and parcel of his everyday life.

The actor - who played the role of Ron Weasley in the 'Harry Potter' movies - said: "It's kind of 50/50 now. It's like if someone stops me, it could go either way. I could be Ed or I could be me."