A three-day celebration of Queen Elizabeth II鈥檚 90th birthday with a prayer at St. Paul鈥檚 and a luncheon at Buckingham Palace.

The traditional parade will be held Saturday 鈥� the Queen鈥檚 official birthday. That鈥檚 when Her Majesty may wave to the crowds from a balcony.

Here鈥檚 a roundup of social media postings capturing the Friday鈥檚 events, including from the CTV National News team on the ground in London.

  • Watch the Queen's birthday parade on CTV News Channel: CTV News Chief Anchor Lisa LaFlamme will bring you 鈥楾he Queen at 90鈥� live from London on Saturday at 6 a.m. ET

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Sadiq Khan, London鈥檚 new mayor, was one of the honoured guests at the church service.

The Queen hosted a lunch at Buckingham Palace for the 15 Governors-General, including David Johnston.

The Prince of Wales and The Duchess of Cornwall also met with the Governors-General.

The Queen鈥檚 grandsons, Prince William and Prince Harry, attended a service at the Guildhall, which is London鈥檚 ancient town hall.

The Royal Air Force paid tribute by performing a drill for commuters in a central London tube station.

Follow along with royals coverage on CTVNews.ca, where we have all the latest on the Royal Family:

The CTV News crew in London is also providing a live, behind-the-scenes look on Snapchat. Follow along by searching for the profile ctvnews or scanning the Snapcode below.

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