British Queen Elizabeth II attended a national service of thanksgiving Friday at St Paul’s Cathedral in London, at the start of a three-day celebration to mark her 90th birthday.
The Queen, accompanied with the Duke of Edinburgh, arrived at St Paul’s and waved to well-wishers on the steps before they went in.
More than 50 Royal Family members, and political figures including Prime Minister David Cameron and his wife Samantha, attended the service.
Local media said more than 2,000 people attended the thanksgiving service at St Paul’s.
The service kicked off a three-day birthday celebrations to mark the Queen’s official birthday.
Her real birthday falls on April 21 and a series of grand celebrations were held earlier this April.
On Saturday, The Queen and her family marked her official 90th birthday with a parade, a colorful military ceremony and an appearance on the Buckingham Palace balcony.
A 10,000 people street party will follow on Sunday in St James’s Park, and the Duke of Edinburgh, Prince William and Prince Harry will attend the party.
The longest-serving monarch of Britain was born in 1926, and became the Queen of Britain in 1952.