Princess Kate Goes to Church With Queen on Queen’s 90th Birthday Celebration

Celebrations abound in the U.K. this weekend for the 90th birthday of Queen Elizabeth II, the nation’s longest reigning monarch—at 63 years.

WINDSOR, UNITED KINGDOM - UNDATED: (EDITORS NOTE: This image may be used free of charge, internationally, for 14 days from release, until Friday June 24, 2016.) This handout released by the Buckingham Palace on June 10, 2016 to mark the Queen's 90th birthday, shows Queen Elizabeth II with her husband, The Duke of Edinburgh, and was taken at Windsor Castle just after Easter. Photo by Annie Leibovitz/Buckingham Palace via Getty Images

Celebrations abound in the U.K. this weekend for the 90th birthday of Queen Elizabeth II, the nation’s longest reigning monarch—at 63 years.

In actuality, today is the birthday of Prince Phillip, who turns 95. The Queen turned 90 on April 21, but tradition has it that the actual celebration takes place at a later date to take advantage of better weather. This year, the Queen selected the second Saturday of June, the 11th.

Today marks the first day of the three-day celebration. On tap for today’s festivities was a Thanksgiving service at St. Paul’s Cathedral. 

Queen Elizabeth II waves as she attends a National Service of Thanksgiving as part of her 90th birthday celebrations at St Paul's Cathedral on June 10, 2016, in London. Mark Cuthbert/UK Press via Getty Images