With the Duchess of Sussex revealing that her due date is late April or early May, who might the new royal baby share their birthday with?

Royal visit to Birkenhead
The Duchess of Sussex as she officially opens Number 7, a ‘Feeding Birkenhead’ citizens supermarket and community cafe, at Princess Pavements, Pyramids Shopping Centre (Anthony Devlin/PA)

Meghan’s baby could easily be born on the same day as his or her great-grandmother the Queen, who will celebrate turning 93 on April 21.

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Meghan and the Queen, who will be 93 on April 21 (Danny Lawson/PA)

Or the new addition to the royal family might even arrive on cousin Prince Louis of Cambridge’s birthday.

Louis turns one on patriotic St George’s Day – April 23.

Royal Baby
The Duke and Duchess of Cambridge with Prince Louis who was born on St George’s Day last year (Dominic Lipinski/PA)

Bookmakers Ladbrokes has now set the odds that Baby Sussex will put in an appearance on the monarch’s birthday at 12/1, and 14/1 for Louis’s big day.

Meghan could even welcome her baby on the same day Princess Charlotte was born – May 2.

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Princess Charlotte (Andrew Matthews/PA)

But odds are 20/1 for dates in early May, according to Ladbrokes, with the firm still predicting an early to mid-April arrival.

Alex Apati of Ladbrokes said: “Meghan’s latest comments have forced us into action, and while we’re convinced it’ll be an early April baby, there’s every chance the latest royal will share a birthday with his or her Great Nan.”

Royal visit to Birkenhead
Meghan at the Number 7 supermarket and community cafe in Birkenhead (Anthony Devlin/PA)

The duchess said, while on official engagements in Birkenhead, Merseyside, that she is six months pregnant and that she and Harry do not know whether they are expecting a girl or a boy.

Royal visit to Birkenhead
Harry and Meghan greeting well-wishers during a visit to Birkenhead’s Hamilton Square (Danny Lawson/PA)

American former actress Meghan stopped to chat to Kim Thompson in Hamilton Square, who said later: “She said she is six months pregnant and due at the end of April, beginning of May.”

The baby looks set to arrive around 11-and-a-half months after Harry and Meghan’s wedding – and before their first wedding anniversary on May 19.

Harry and Meghan on a carriage ride through Windsor following their wedding
Harry and Meghan on a carriage ride through Windsor following their wedding (Aaron Chown/PA)

This follows in the footsteps of Harry’s parents Diana, Princess of Wales and the Prince of Wales.

Harry’s older brother Prince William, now the Duke of Cambridge, was born in June 1982 – 11 months after Diana wed Charles in July 1981.

Diana Charles & baby
Diana and Charles with baby Prince William (PA)

The Duke and Duchess of Cambridge’s first child Prince George arrived two years and three months after they wed.

But the Queen, then Princess Elizabeth, welcomed Charles in November 1948, a year after she married the Duke of Edinburgh in November 1947.

– Here are some famous birthdays and anniversaries in late April and early May:

April 18 – Actresses Hayley Mills, Melissa Joan Hart, and America Ferrera, reality TV star Kourtney Kardashian.

April 19 – Actress Kate Hudson, actor Hayden Christensen, former Olympic athlete Dame Kelly Holmes, tennis player Maria Sharapova.

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Dame Kelly Holmes celebrates her birthday on April 19 (Adam Davy/PA)

April 20 – Adolf Hitler, TV presenter Peter Snow, actor Ryan O’Neal.

April 21 – The Queen, Iggy Pop, Princess Isabella of Denmark, The Cure’s Robert Smith.

April 22 – Actor Jack Nicholson, Vladimir Lenin, footballer David Luiz.

The Bucket List UK Premiere – London
Actor Jack Nicholson (Joel Ryan/PA)

April 23 – St George’s Day. Prince Louis, actor John Hannah, Lady Gabriella Windsor – daughter of Prince and Princess Michael of Kent, model Gigi Hadid.

April 24 – Singer Barbra Streisand, football manager Stuart Pearce.

April 25 – Actor Al Pacino, Abba’s Bjorn Ulvaeus, Suits star Gina Torres – a co-star of former actress Meghan.

Royal wedding
Meghan’s former Suits co-star Gina Torres, at St George’s Chapel for the royal wedding, celebrates her birthday on April 25 (Ian West/PA)

April 26 – Duke of York’s ex-girlfriend Koo Stark, Duran Duran musician Roger Taylor.

April 27 – Strictly judge Darcey Bussell, actress Jenna-Louise Coleman.

Graham Norton Show – London
Darcey Bussell (Matt Crossick/PA)

April 28 – Cyclist Sir Bradley Wiggins, the Duke of Kent’s daughter Lady Helen Taylor.

April 29 – William and Kate’s eighth wedding anniversary. Actor Sir Daniel Day-Lewis, former cricketer Phil Tufnell, actress Michelle Pfeiffer, Edward VII’s mistress Alice Keppel.

April 30 – King Carl XVI Gustav of Sweden, actor Leslie Grantham, actress Kirsten Dunst. The late Queen Juliana of the Netherlands.

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Actress Kirsten Dunst (Ian West/PA)

May 1 – May Day – International Workers’ Day. Queen Victoria’s son Prince Arthur Duke of Connaught and Strathearn, actress Joanna Lumley, Lady Sarah Chatto – Princess Margaret’s daughter, actor Matt Di Angelo.

May 2 – Princess Charlotte of Cambridge. David Beckham and singers Lily Allen and Engelbert Humperdinck, broadcaster Alan Titchmarsh.

May 3 – Singer Frankie Valli, comedian Ben Elton, football manager Steve McClaren, and actress Christina Hendricks.

May 4 – TV personality Michael Barrymore, TV presenter Kate Garraway, golfer Rory McIlroy.