U.S. actress Meghan Markle finally confirmed on Thursday her father would not be attending her wedding to Britain's Prince Harry, putting an end to days of speculation that marred the build-up to this weekend's glittering ceremony.

Harry, Queen Elizabeth's grandson, and Markle, a star of TV drama "Suits", will tie the knot on Saturday at the 15th Century St George's Chapel in Windsor Castle, home to the British royal family for nearly 1,000 years.

Markle's father, Thomas, had been due to walk his daughter down the aisle in front of a congregation of senior royals, celebrities, friends of the couple and a TV audience of hundreds of millions.

But the former lighting director for TV soaps and sitcoms gave a series of contradictory statements this week about whether he would be there, with the Los Angeles-based celebrity website TMZ.com saying he had undergone heart surgery on Wednesday.

"Sadly, my father will not be attending our wedding. I have always cared for my father and hope he can be given the space he needs to focus on his health," Meghan Markle, 36, said in a statement.

"I would like to thank everyone who has offered generous messages of support. Please know how much Harry and I look forward to sharing our special day with you on Saturday."

Saturday's wedding will be sumptuous show of British pageantry that is likely to attract a huge world audience.

Supporters hope the union of one of the most popular royals and a glamorous American actress, a divorcee with a white father and an African-American mother, will reinvigorate the monarchy.

Beside the British royal family, which blends sometimes stuffy European traditions with the global popularity of modern superstars, Markle has brought some Hollywood glamour and a sense of modernity to the House of Windsor.

However, much of the carefully planned and choreographed build-up to the ceremony has been overshadowed by confusion over the attendance of Markle's father, who is divorced from her mother, Doria Ragland, a yoga instructor and social worker.

TMZ said it had spoken to Markle's father after his surgery and that "he seemed alert and coherent, telling us doctors implanted stents in his blood vessels". It was not known when he would be out of the hospital.

Ragland, who will spend the night before the wedding with her daughter in a luxury hotel and accompany her to the chapel, has arrived in Britain and is due to meet the 92-year-old queen and her husband Prince Philip, 96, on Thursday. Royal commentators have speculated she will now walk her daughter down the aisle instead.

GLOBAL SPECTACLE

More than 5,000 media and support staff have registered for official positions in Windsor for the wedding, along with more than 160 photographers and 79 international TV networks, Kensington Palace said.

After the hour-long ceremony which will be attended by the queen and senior royals, the couple will take part in a procession through the town's ancient streets on a 19th Century Ascot Landau carriage pulled by four Windsor Grey horses.

Police are expecting more than 100,000 people to throng the streets outside the Castle, the queen's home west of London and the oldest and largest inhabited fortress in the world, and have said there would be tight security for the event.

A large number of officers were present as crowds gathered to watch the troops who will accompany the newlyweds on the carriage procession perform a practice run on Thursday.

Britain’s monarchy continues to be a source of fascination around the world and few other countries can emulate the pageantry which surrounds the royals.

Queen Elizabeth, the world's longest reigning current monarch, is deeply respected and popular in Britain. Harry, 33, the younger son of the late Princess Diana, has himself always been a very popular figure member of the royal family.

A cheeky child who stuck his tongue out at photographers, he left a lasting memory in the minds of many when aged just 12, he walked solemnly behind his mother's coffin as her funeral cortege made its way through London after her death in a car crash in 1997.

While a global audience will be watching the wedding, some polls have suggested that many Britons are not as enthralled by the nuptials as the media.

A YouGov poll, commissioned by anti-monarchist pressure group Republic, found that 66 percent of Britons were not interested in the event, with 60 percent of Britons planning to have a normal weekend.

The poll also showed that 57 percent of respondents believed the royal family should pay not only for the wedding but also for the costs of police, which are expected to surpass the 6 million pound ($8 million) price tag for the 2011 wedding of Harry's brother Prince William to wife Kate.

However, other surveys show most Britons are in favour of the monarchy continuing in Britain and that the wedding and the birth last month of William and Kate's third child, Prince Louis, were events of which Britain could be proud.

The YouGov survey suggested that the popularity of the royal family is contingent on the personalities of its members. While the queen and younger royals such as Harry score highly, heir-to-the-throne Charles is far less popular.

"This YouGov poll shows a very clear picture of a nation disinterested and apathetic about the royal family," Graham Smith, chief executive of Republic, said.

"We're not a nation of republicans yet - but we've stopped being a nation of royalists."