Happy Birthday, Queen Elizabeth II! The British monarch turns 94 years old on April 21, 2020.
Check out the gallery above to see how Queen Elizabeth II has changed from her days as Princess Elizabeth, to ascending the throne in 1952, to today.
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The Duke and Duchess of York at the christening of their daughter Princess Elizabeth in 1926. (Universal Images Group via Getty Images)
Princess Elizabeth rides her tricycle in the park in 1930. (Corbis via Getty Images)
King George V and Queen Mary, with Princess Margaret, just visible over balcony, and Princess Elizabeth waving, on the balcony of Buckingham Palace, London, May 6, 1935. (AP Photo)
Princess Elizabeth poses with a pony in Windsor Great Park in Berkshire on April 21, 1939. (Central Press/Getty Images)
This is the official wedding picture of Princess Elizabeth and her new husband, Prince Philip, Duke of Edinburgh, after their marriage in Westminster Abbey on Nov. 20, 1947. (AP Photo)
The Duke of Edinburgh, his wife, Princess Elizabeth, and their two children, Prince Charles and Princess Anne, sit for an official photograph released on Jan. 9, 1951, in London. (AP Photo)
Queen Elizabeth II poses on her Coronation Day on June 2, 1953, in London. (AFP via Getty Images)
Queen Elizabeth II, wearing the imperial crown, walks through the royal gallery to officiate at the opening of a new session of the British Parliament in London on Nov. 30, 1954. (AP Photo)
Sitting on rugs on the lawn like ordinary folks, the British royal family poses for a picture during a holiday at Balmoral, Scotland, in September 1960. (AP Photo)
Queen Elizabeth II poses with President John F. Kennedy before a state dinner at Buckingham Palace on June 5, 1961. (AP Photo/Pool)
Queen Elizabeth II and her husband Prince Philip are seen during their visit to the island of Tortola, the main island of the British Virgin Islands on Feb. 23, 1966. (AP Photo)
Queen Elizabeth II with one of her corgis at Sandringham in 1970. (Bettmann Archive)
Queen Elizabeth II visits the Town Hall in Sydney with Emmet McDermott, Lord Mayor of Sydney, during her tour of Australia in May 1970. (Keystone/Hulton Archive/Getty Images)
President Gerald Ford dances with Queen Elizabeth II at the White House, on July 7, 1976, following a State Dinner in the queen's honor. (AP Photo/John Duricka)
Queen Elizabeth II and Prince Philip, the Duke of Edinburgh travel in a carriage during celebrations for the Silver Jubilee in London on June 7, 1977. (AP Photo)
Prince Charles kisses his bride, Diana Spencer, the new Princess of Wales, at Buckingham Palace in London on July 29, 1981, after their wedding. Queen Elizabeth stands at right. (Pool Photo via AP, File)
In this June 8, 1982 photo, President Ronald Reagan, left, on Centennial, and Queen Elizabeth II, on Burmese, go horseback riding on the grounds of Windsor Castle, England. (AP Photo/Bob Daugherty, file)
In this Aug. 4, 1987 file photo, Diana, Princess of Wales, left, and Britain's Queen Elizabeth II smile to well-wishers outside Clarence House in London. (AP Photo/Martin Cleaver, File))
Prince Charles, Prince Harry, Prince William, Queen Elizabeth II and her butler, William Tallon, gather outside her home on Aug. 04, 1995. (Tim Graham Photo Library via Getty Images)
Queen Elizabeth II and Prince Philip, the Duke of Edinburgh, ride in an open-top car as they return to watch a parade celebrating Queen Elizabeth's Golden Jubilee on June 4, 2002. (Tim Graham Photo Library via Getty Images)
Prince Harry, second from right, grins and his grandmother, Queen Elizabeth II, smiles at the Royal Military Academy in Sandhurst, England on April 12, 2006. (AP Photo/Dylan Martinez, pool)
Queen Elizabeth II, Carole Middleton and Camilla, Duchess of Cornwall come out of Westminster Abbey following the wedding of Prince William and Kate on April 29, 2011. (CARL DE SOUZA/AFP via Getty Images)
Queen Elizabeth II and President Barack Obama during a state banquet in Buckingham Palace, London, on May 24, 2011. (AP Photo/Lewis Whyld, Pool)
Queen Elizabeth II, Prince Charles, Camilla, Duchess of Cornwall, Prince William, Kate Duchess of Cambridge and Prince Harry conclude Diamond Jubilee celebrations on June 5, 2012. (AP Photo/Lefteris Pitarakis, File)
Queen Elizabeth II watches the Opening Ceremony at the 2012 Summer Olympics, on July 27, 2012, in London. (AP Photo/Matt Dunham)
Queen Elizabeth II speaks to Prince George as his father Prince William looks on, as they leave after attending the Christening of Princess Charlotte on July 5, 2015. (Getty Images)
Queen Elizabeth II and Meghan, the Duchess of Sussex, at the opening of the new Mersey Gateway Bridge, in Widnes, Cheshire, on June 14, 2018. (Danny Lawson/PA Wire)
Queen Elizabeth II with President Joe Biden and first lady Jill Biden in the Quadrangle during their visit to Windsor Castle in Berkshire on Sunday, June 13, 2021. (Arthur Edwards/The Sun/PA Wire)
Queen Elizabeth II looks at a fan as she views a display of memorabilia from her Golden and Platinum Jubilees in the Oak Room at Windsor Castle on Feb. 4, 2022. (Steve Parsons/PA Wire)