IN a matter of weeks, Princess Eugenie will walk down the same aisle Meghan Markle walked down in May.

And while this time, Meghan will be watching from a pew, one person who could be noticeably absent is Kate Middleton.

Princess Eugenie will marry Jack Brooksbank on October 12 at St. George’s Chapel, within Windsor Castle.

And while it was expected that The Duke and Duchess of Cambridge would be there to witness the nuptials, Wills could end up attending without his wife.

According to the Express, Princess Eugenie's wedding could clash with a hugely significant date for the 36-year-old: her pregnant sister Pippa's due date.

Uh-oh.

34-year-old Pippa - who is expecting her first child with husband James Matthews - recently revealed in her Waitrose column that she's now in her second trimester.

Which means she's likely to have the baby in October.

And while Pippa's due date hasn't been confirmed, if she does go into labour, it's expected Kate will want to be by her side.

When The Duchess of Cambridge gave birth to Prince Louis in April, Pippa was spotted driving to Kensington Palace the very next day.

Here's to hoping Kate will be able to make both special occasions.

Last month, it was revealed that Princess Eugenie would be having a very similar guest list to Meghan and Harry.

Robbie Williams and wife Ayda are expected to be attending, as well as George and Amal Clooney.

And Princess Eugenie seems to have taken some tips from The Duke and Duchess of Sussex.

The 28-year-old is also inviting 1,200 members of the public into the grounds of Windsor Castle for the special day.