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Queen Elizabeth II’s Platinum Jubilee kicks off today in the UK, celebrating seven decades of her service. The four-day celebration marks the first time a Platinum Jubilee has taken place in British history, with the queen holding the record for being the longest-reigning monarch. The 96-year-old queen ascended the throne in 1952, following the death of her father, King George VI.

The celebration begins with the queen’s birthday parade (6 am ET, ABC News), followed by a royal family balcony appearance. Other events include a concert, the lighting of 3,200 torchlights, horse races, and more. The celebration will end Sunday with the Platinum Jubilee Pageant—four acts of music and theater, among other celebrations.

The popular royal has signaled she has no plans to retire; nearly 86% of Brits say they are satisfied with the queen’s performance. Millions of people worldwide are expected to celebrate, with more than 200,000 events and street parties planned.

See some of the world changes during the queen’s reign here.