Thomas Markle said he had broken the news to Meghan in an emotional phone call just days before she was due to walk down the aisle in Windsor Castle's St George's Chapel.
As guests descend on Windsor for Prince Harry and Meghan Markle's wedding, here's a rundown of how the celebrities know Meghan and Harry
Thames Valley said the tradition posed a "potential security risk" during the Prince Harry and Meghan Markle's carriage procession.
Andrea McDowell, who runs a wedding video company, started a social media campaign to get herself invited to Prince Harry and Meghan Markle’s big day
The Ark Project, a homeless shelter that operates from a bus in Windsor and the surrounding area, has had its bus impounded in the run up to the royal wedding
Ms Markle asked The Prince of Wales to give her away after her father is no longer able to attend the wedding.
In a statement released by Kensington Palace, the bride-to-be spoke of her sadness that Thomas Markle would miss her big day.
Thomas Markle suffered an apparent heart attack last week and it is claimed he will undergo surgery in the US.
Prince Harry and Meghan Markle have appealed for “understanding and respect” to be shown to the actress’ father amid speculation he will not attend their wedding in Windsor this Saturday.
The Royal Borough of Windsor and Maidenhead reminded members of the public via Twitter to dress for "a long day spent outside".
Alexi Lubomirski, 42, who photographed the pair for their engagement, will be at Windsor Castle next month to take the official wedding shots
May, Trump, Corbyn and Obama will all miss the May 19 royal wedding
Kensington Palace announced that 1,200 members of the public are to be invited to the royal wedding
The couple have chosen the Myna Mahila Foundation as well as six other organisations
The Royal couple will have lunch at the Crown Liquor Saloon and then go on a walkabout outside the building
The actress went to a two-day training session with Prince Harry in Herefordshire
What do Boris Johnson, Victoria Beckham and the UK weather have in common? They were all covered by MG and KP on their show today.
Mel B has claimed the Spice Girls have been invited to Prince Harry and Meghan Markle's wedding
A campaigner has claimed a petition against the fines has forced the council to reconsider its proposal
Ukip leader Henry Bolton has split from model Jo Marney after her comments on Meghan Markle
Conservative council leader Simon Dudley called for beggars to be removed from the streets ahead of the Royal Wedding
Julia Hartley-Brewer says people shouldn't be begging as it's a criminal offence and they should have access to benefits
Many have expressed their anger at Harry for creating the clash, but others have settled for plain mockery
Prince Harry and Meghan Markle visited Nottingham and went to the World Aids Day charity fair run by the Terrence Higgins Trust
Surprisingly Prince Harry's bride to be actually has quite a famous family tree
If Meghan Markle has to follow all the rules of becoming a British citizen she's got a long way to go yet
Adams cheekily suggested his on-screen love had gone behind his back to hook up with the British royal
Royal commentator Rupert Bell says this Royal wedding reflects that times are changing
Speculation has been growing as to whether the US President will be invited to the wedding of Prince Harry and Meghan Markle
Some are upset that they're not marrying a Prince whilst others are happy at the prospect of an extra bank holiday