The 22-year-old singer said his brain could not "process" the email sent to him by Peter Jackson, the movie's director as he was too drunk, reported Contactmusic.
"I was off my face drunk. There was a lot of champagne and champagne gets me drunk quite quickly. I looked at my email. It was like a dream. I didn't process it.
"So then I put my phone away and continued partying. The next day I read it again and was worried," Sheeran said.
