Meghan Markle's invitation to Archie's birthday 'snubbed by A-list celebrity' who attended Coronation instead

Prince Harry rushed back from King Charles's Coronation to make the celebration in Montecito.

Katy Perry attended the historic ceremony at Westminster Abbey on Saturday.

The singer is due to perform at the Coronation concert today at Windsor Castle.

LA-based author Lisa Gaché told the Telegraph that Perry and her fiancé Orlando Bloom would have been invited to Archie's birthday party.

Gaché said: "In Montecito, celebrities are royalty."

She continued: "It’s Oprah and Ellen but also Serena Williams – pregnant with her second child – and Katy Perry and Orlando Bloom, whose daughter Daisy is a year younger than Archie.

"If there’s any celebrity with a child the same age, it’s safe to assume they’ll be invited."

It comes as Prince Harry flew straight back to America following King Charles's Coronation.

The Duke of Sussex caught a flight from London Heathrow airport on Saturday afternoon.

Meghan Markle did not attend the Coronation with her husband, instead choosing to remain at home with their young children.

In April it was confirmed that the Duke of Sussex would attend the Coronation on his own.

The Palace said in a statement announcing the decision: "Buckingham Palace is pleased to confirm that the Duke of Sussex will attend the Coronation Service at Westminster Abbey on 6th May.

"The Duchess of Sussex will remain in California with Prince Archie and Princess Lilibet."