If successful, they will be able to watch the arrival of the congregation, including members of the Royal Family, and have a prime position as the bride and groom leave St George's Chapel after the ceremony.
Buckingham Palace has released further details about Princess Eugenie's wedding to Jack Brooksbank ahead of their big day on October 12.
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The other attack occurred in the neighboring town of Brookhaven, in the waters off Sailors Haven Beach, an Islip spokesman said. The boy "stumbled out of the water" into a lifeguard tent, where the lifeguard dressed puncture wounds, officials said.
Eugenie, 28, younger daughter of Queen Elizabeth's third child Prince Andrew and his ex-wife Sarah Ferguson, the Duchess of York, will tie the knot with boyfriend Jack Brooksbank, 32, at the monarch's Windsor home on October 12.
Soon after the Duke and Duchess of Sussex announced they were tying the knot, Harry's cousin Eugenie followed suit by revealing her engagement.
The couple will then take a short carriage trip through Windsor, echoing that of Harry and Meghan when huge crowds turned out to watch.
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Princess Eugenie, who works in the arts as a director at gallery Hauser and Wirth, is the second daughter of Prince Andrew and Sarah, Duchess of York. Members of the public can apply for up to four tickets on the royal family's official website.
Successful applicants will be notified by email with Entry Cards and information issued by post at a later date. Are you a fan of Princess Eugenie?
Also present in the castle grounds will be representatives of charities supported by Princess Eugenie and Brooksbank, together with members of the Windsor community and children from Eugenie's former schools.
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The former president used the speech as an opportunity to outline what he views as troubling trends in the political arena. He will also host a town hall event in Johannesburg on Wednesday for 200 young leaders selected from across Africa.
The event will not be dissimilar to Harry and Meghan wedding, when 1,200 members of the public were also invited to attend, the streets of Windsor thronging with royal enthusiasts, local residents and well-wishers from further afield.