Meghan Markle and Prince Harry are due to welcome their first child this month , but they're keeping the exact due date a secret.
During the pregnancy the couple have dropped several hints and said Baby Sussex will arrive in April, so fans are hoping for news any day now.
The newest member of the Royal Family could end up sharing their birthday with some very special people - including great-granny the Queen or cousins Prince Louis or Princess Charlotte.
The Queen turns 93 on April 21 - which is also Easter Sunday this year - while Charlotte, the Duke and Duchess of Cambridge's middle child, celebrates her fourth birthday on May 2.
If Baby Sussex arrives early, he or she might even put in an appearance on Prince Louis's birthday.
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Louis, the youngest member of William and Kate's brood, turns one on April 23 - patriotic St George's Day.
The royal baby , who will be seventh in line to the throne, is expected to arrive before Harry and Meghan's first wedding anniversary on May 19.
The youngster's star sign will be Taurus if he or she is born between April 21 and May 21, but if Meghan gives birth before April 21, the baby will be and Aries.
Here are some of the other celebrities and stars Baby Sussex could share a birthday with:
April 18 - Actresses Hayley Mills, Melissa Joan Hart, and America Ferrera, reality TV star Kourtney Kardashian. Maundy Thursday.
April 19 - Actress Kate Hudson, actor Hayden Christensen, Olympic athlete Dame Kelly Holmes, tennis player Maria Sharapova. Good Friday - bank holiday. Start of the Jewish festival of Passover (to April 27).
April 20 - TV presenter Peter Snow, actor Ryan O'Neal.
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April 21 - The Queen, Iggy Pop, Princess Isabella of Denmark, The Cure's Robert Smith. Easter Sunday.
April 22 - Actor Jack Nicholson, Vladimir Lenin, footballer David Luiz. Easter Monday - bank holiday.
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.
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April 26 - Duke of York's ex-girlfriend Koo Stark, Duran Duran musician Roger Taylor. Seventh anniversary of the modern Commonwealth.
April 27 - Strictly judge Dame Darcey Bussell, actress Jenna-Louise Coleman.
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.
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April 30 - King Carl XVI Gustav of Sweden, late actor Leslie Grantham, actress Kirsten Dunst. The late Queen Juliana of the Netherlands.
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.
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May 3 - Singer Frankie Valli, comedian Ben Elton, football manager Steve McClaren, and actress Christina Hendricks.
May 4 - TV presenter Kate Garraway, golfer Rory McIlroy.
May 5 - Actor and presenter Michael Palin, actor Richard E Grant, rowing champion James Cracknell, singer Adele.
May 6 - Former PM Tony Blair , former footballer Graeme Souness, actor George Clooney, actress Leslie Hope. Early May bank holiday.
