Queen will “host Kate Middleton and Prince William’s 40th birthday party” this summer as the couple “celebrate in style.”

The Queen will host a joint celebration of Prince William and Kate Middleton’s 40th birthday this summer, it has been reported.

The Duke of Cambridge, who turns 40 on Tuesday, is said to have been given the green light to party at Windsor Castle or Sandringham Estate.

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Royal sources told the Mirror it was agreed that he and Kate, who turned 40 earlier this year, should “celebrate their milestone birthdays in style”.

And the Queen, 96, can join them and other senior royals at the bash – if she feels up to it.

A palace source told Der Spiegel the monarch, who has been suffering from increasing mobility problems in recent months, will only confirm her presence on the day of the party.

But the likes of Prince Charles and Camilla are expected to be there with the bells on.

Wills has had birthdays together in the past, sharing his 18th party with Prince Andrew’s 40th, Princess Anne’s 50th and Princess Margaret’s 70th.

But in a royal first, William will not have the Union Flag flown from government buildings on his big day – a move reportedly spared Prince Andrew’s blush.

The Sun revealed last night that the Government has withdrawn the honor for all the Queen’s children’s birthdays – a change believed to have been signed by Her Majesty herself.

Insiders said it was “so as not to upset Andrew, who is downright touchy on such matters.”

And another source agreed: “It’s widely believed it happened to avoid embarrassing Andrew.”

Andrew’s resignation from royal duties over his links to pedophile Jeffrey Epstein and sexual abuse allegations against him caused an uproar.

The government said: “Since 2021, the standard has been to fly the flag all year round unless another flag is flown.”

Buckingham Palace and Kensington Palace have been asked for comment.

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