Queen Elizabeth II's 70 years on the throne allowed her to meet with 12 U.S. presidents, some of whom died before her.

Here are the powerful U.S. leaders the queen had met as a British monarch:

The Queen assumed the throne in 1952 and was the world's longest-reigning monarch at the time of her death Thursday. In 1951, she traveled to the U.S. for the first time to meet then-President Harry Truman when she still held the title of princess at the age of 25. Queen Elizabeth II reportedly told Truman at the time, "Free men everywhere look toward the United States with affection and with hope."

She returned to the U.S. five years later as a queen for a meeting with President Dwight Eisenhower. The two struck a close friendship and sent letters to each other for years. The queen even shared her recipe for grilled scones with Eisenhower.

The queen sat next to former president Herbert Hoover in a luncheon in New York City in 1957 - two decades after he ended his term in office in 1933.

The queen also met President John F. Kennedy and First Lady Jacqueline Kennedy when the pair toured France and England in 1961. They were treated to a lavish dinner at Buckingham Palace.

The queen also shook hands with President Richard Nixon, whom she had already met when he was Eisenhower's vice president. Nixon reportedly tried to set up his daughter with Prince Charles.

In honor of the queen, the Richard Nixon Library shared photos from the queen's visit to the country estate of the British Prime Minister in 1970.

Queen Elizabeth II and Prince Philip also enjoyed a state dinner at the White House Rose Garden in 1976 with President Gerald Ford and First Lady Betty Ford.

President Jimmy Carter joined the queen for a NATO dinner at Buckingham Palace in 1977. He shocked the world when he accidentally kissed the queen on the lips.

"I took a sharp step backward - not quite far enough," Queen Elizabeth said about the meeting, according to her biographer William Shawcross.

The Queen Mother met President Ronald Reagan multiple times during his eight-year term in office. She also visited their family ranch in 1983 where she and the president bonded over their shared love for horses. The Queen wanted to ride a horse with Reagan but "the weather was awful, so instead the Reagans left the ranch to go on the royal yacht Britannia," Kate Andersen Brower, author of "First Women: The Grace and Power of America's Modern First Ladies," said in her book.

The queen also went to her first baseball game following an invitation from President George H.W. Bush to a match between the Baltimore Orioles and Oakland Athletics in 1991. Upon his death in 2018, the queen released a statement and called him a "patriot." Prince Charles represented the Royal Family at his funeral.

In 1994, President Bill Clinton, his wife Hillary and daughter Chelsea visited Queen Elizabeth to celebrate the anniversary of D-Day.

Meanwhile, George W. Bush and his wife Laura's visit to Buckingham Palace in 2003 was met with large protests due to the Iraq war.

President Barrack Obama and First Lady Michelle's first get-together with the queen was in 2009 when the Obamas gifted the queen an iPod. The British tabloids criticized the gift and called it "lame."

President Donald Trump committed several faux-pas during his visit to the British Monarchy in 2018, which began when he arrived late for the meeting.

He also walked in front of her and shook her hand instead of bowing to her. He also turned his back on the queen.

The British monarch met President Joe Biden and his wife Jill when they visited Windsor Castle last year.

Queen Elizabeth II attended a garden party at Government House in Perth, Western Australia in 2011