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He started with Taylor Swift and One Direction - now Ed Sheeran could be writing for even more of the pop elite.
According to Taylor herself, doors are opening for Ed Sheeran - and even Justin Bieber himself could be after a hit penned by the 'A Team' singer.
Ed has written three songs for One Direction - one of which, 'Little Things', is currently No.1 in the UK charts - and wrote 'Everything Has Changed' with Taylor for her current album Red, as well as featuring on the track.
And he could be going on to even bigger things. Taylor told The Daily Star, "I think Ed is fast becoming the most in-demand songwriter in the world. It was a pleasure working with him. He has a real talent.
"Writing for One Direction has pretty much made him in demand from everybody. I know Justin Bieber loves his songs and I have heard Beyonce and Rihanna want him to write for them as well.
"He's a talented performer, too, but in 20 years we could be looking back at him as one of the all-time great songwriters."
Ed posted a photo with Taylor on his Instagram earlier this year.
Ed also sparked dating rumours with Taylor - although who doesn't - after he tattooed the name of her album on his arm. Apparently though, there's nothing to worry about.
He told Entertainmentwise, "If you see pictures of my arm it's got loads of random s**t and everytime something big happens to me I get ink on my skin.
"I think having the first US number one with Taylor and then going on tour with her is a big part of my life."
He added, "We are very good friends and that's kind of it."
Watch Ed Sheeran singing One Direction's 'Little Things' below:
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