But he may have competition from his close friend and fellow English singer Sam Smith.
“I’m obsessed. I want to sing at the wedding,” Smith told The Sun. “Oh my God I’d love to, it would be a dream.”
Elsewhere, popular artist Stormzy recently told the crowd at the MOBO Awards that he would like to perform “a little acoustic for young Harry”, and the Prince is also good friends with both The Killers and Foo Fighters frontman Dave Grohl.
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Grohl recently told the BBC: “He is the sweetest, he’s a great guy.”
Pop singer Ellie Goulding was the big name act at Prince William’s wedding in 2011, performing a moving rendition of Elton John’s ‘Your Song’ for the couple. The emotional song is said to be Catherine’s favourite.
She’s previously been pictured laughing and joking round with the groom-to-be at a music festival in London.
Meghan, meanwhile, is a big fan of American singer Janelle Monáe, who could be asked to serenade the couple, too.
Who would you like to see perform at Prince Harry and Meghan Markle’s wedding?