According to reports, both Adele and Ed Sheeran have turned down the chance to sing for King Charles III during his coronation.

On May 7, the King will be installed at Westminster Abbey, and a subsequent ceremony will take place at Windsor Castle.

The two worldwide superstars, though, are reportedly both "too busy" to perform for royalty.

‘The King has suggested a number of people he would like to perform and Adele and Ed were on that list,’ a source said.

‘He was very keen that they were part of the concert.’

They added to Mail on Sunday: ‘There is a team set up to get the talent signed up so they approached the two of them, but got replies saying that they were unavailable, which was a massive disappointment.

King’s Coronation takes place on May 7 (Picture: Chris Jackson/Getty Images)

‘They are titans of the showbiz industry and are quintessentially British but also known across the globe.’

‘It’s such a shame,’ the insider claimed.

Thinking Out Loud hitmaker Ed, 32, does in fact have commitments around the time of the Coronation.

A representative for Ed also told Metro.co.uk that neither the star nor his team has even been ‘approached’ about a possible performance.

Ed actually has a show in Texas the day before the Coronation gig, meaning it would be pretty hard (not to mention tiring) for him to make the trip back home.

has a show in the States the day before the Coronation gig (Picture: AAPIMAGE)

is currently performing in Vegas, but her May diary is unknown (Picture: Kevin Mazur/Getty Images for AD)

However, since Ed has used a private jet in the past, insiders claim it would be possible for him to do so again for the nine-hour journey.

Meanwhile, it’s unknown what Adele, 34, will be doing around the time of the Coronation.

Source: Metro.co.uk