© Getty Images

Arnold Schwarzenegger and Clint Eastwood -

Then-California governor Arnold Schwarzenegger pumps hands with Clint Eastwood after "the man with no name" was inducted into the California Hall of Fame in 2006 in Sacramento.

© Getty Images 

Will Smith and Tom Cruise -

Will Smith poses with Tom Cruise as Smith is honored with a hand and footprint ceremony at Grauman's Chinese Theatre in 2007 in Los Angeles.

© Getty Images 

Mickey Rourke and Laura Dern -

Mickey Rourke and Laura Dern lock hands in the Trophy Room at Film Independent's 2009 Independent Spirit Awards held at the Santa Monica Pier. The late Philip Seymour Hoffman looks on.

© Getty Images 

Clive Owen and Leonardo DiCaprio -

Leonardo DiCaprio leans over George Clooney and Penélope Cruz to shake the hand of Clive Owen as all four settle in to watch the Giorgio Armani Privé fashion show in Los Angeles in 2007.

© Getty Images 

John Lennon and Paul McCartney -

The Beatles hold the sleeve of their new LP, 'Sgt. Pepper's Lonely Hearts Club Band,' at the press launch for the album, held at manager Brian Epstein's house in London in May 1967.

© Getty Images 

Diana, Princess of Wales and Steven Spielberg -

Diana, Princess of Wales attends the premiere of 'Jurassic Park' in London in July 1993, and shakes the director's hand.

© Getty Images 

Pelé and Nelson Mandela -

Brazilian soccer legend Pelé shakes hands in July 2007 with former South African President Nelson Mandela in Johannesburg.

© Getty Images 

Marilyn Monroe and Tony Curtis -

Marilyn Monroe is reunited with co-star Tony Curtis at a 1959 press conference for the movie 'Some Like It Hot.'

© Getty Images 

Robert De Niro and Mike Tyson -

Robert De Niro and boxer Mike Tyson shake fists after meeting at the Hard Rock Hotel & Casino in Las Vegas in 2008.

© Getty Images 

Elvis Presley and Richard Nixon -

US President Richard Nixon meets and greets the King of Rock 'n' Roll at the White House in December 1970.

© Getty Images 

Niki Lauda and Lewis Hamilton -

Formula 1 legend Niki Lauda (1949–2019) with his Laureus Lifetime Achievement Award shakes the hand of fellow F1 driver Lewis Hamilton at a ceremony in Berlin in 2016.

© Getty Images 

Bing Crosby and David Bowie -

Bing Crosby and David Bowie bridge the generation gap with a hand shake during the taping of the television special 'Bing Crosby's Merrie Olde Christmas' in 1977. The two singers, of diverse styles, sang together on 'Peace on Earth/Little Drummer Boy.' The show was recorded just five weeks before Crosby's death on October 14, 1977. It was aired posthumously.

© Getty Images 

Barack Obama and Denzel Washington -

US President Barack Obama shakes hands with Denzel Washington during the Neighborhood Inaugural Ball in 2009 in Washington, D.C.

© Getty Images 

Frankie Valli and Elton John -

Elton John and Frankie Valli shake hands at a 1975 party for the premiere of Ken Russell's film 'Tommy' in New York City.

© Getty Images 

Michael Jackson and Ronald Reagan -

After lending his hit song 'Beat It' to a campaign against drunk driving, Michael Jackson was rewarded with a Presidential Special Achievement Award by US President Ronald Reagan in 1984. The pair, watched by First Lady Nancy Reagan, shake hands on the White House lawn.

© Getty Images 

Queen Elizabeth II and Frank Sinatra -

Guest Frank Sinatra bows in deference as he is presented to a smiling Queen Elizabeth II at the 1958 London movie premiere of 'Me and the Colonel.' The film starred Danny Kaye and Curd Jürgens.

© Getty Images 

Harry Belafonte and Martin Luther King -

Singer Harry Belafonte shakes hands with civil rights activist Martin Luther King Jr. at New York's John F. Kennedy International Airport in 1964.

© Getty Images 

Adam Sandler and Jack Nicholson -

Jack Nicholson greets Adam Sandler at the after party following the Los Angeles premiere of Sandler's film 'Spanglish' in 2004.

© Getty Images 

The Queen Mother and Sammy Davis Jr. -

The Queen Mother shakes hands with Sammy Davis Jr. as Jerry Lewis looks on during a meet-and-greet presentation at the Royal Variety Show in London in November 1966.

© Getty Images 

Björn Borg and John McEnroe -

Björn Borg congratulates John McEnroe for his win at the US Open in 1981. It was McEnroe's third consecutive men's tennis singles title. The pair were great rivals on court, but the best of friends off it.

© Getty Images 

Jim Brown and Muhammad Ali -

Former NFL superstar turned actor Jim Brown greets heavyweight boxer Muhammad Ali at an event in New York City in November 1971.

© Getty Images 

Bill Gates and Queen Latifah -

Microsoft's Bill Gates and entertainer Queen Latifah attend the Digital Entertainment Anywhere launch at the Shrine Auditorium in October 2004 in Los Angeles.

© Getty Images 

Charlton Heston and Juan Carlos -

Charlton Heston shakes hands with Prince Juan Carlos, the future King of Spain, while filming 'El Cid' in the country in 1960.

© Getty Images 

Harry Houdini and Sir Arthur Conan Doyle -

Escape artist Harry Houdini and Sherlock Holmes creator Sir Arthur Conan Doyle shake hands as Doyle prepares to depart for the UK on the SS Adriatic after his visit to the United States in 1922.

© Getty Images 

Elizabeth Taylor and Josip Broz Tito -

Elizabeth Taylor with husband Richard Burton meets the President of Yugoslavia, Josip Broz Tito, at his summer residence on Brioni island in August 1971.

© Getty Images 

Martin Lawrence and Dennis Hopper -

Martin Lawrence poses with Dennis Hopper in 1994 during a get-together in Las Vegas.

© Getty Images 

Adrien Brody and Jay Leno -

'Tonight Show' guest Adrien Brody greets host Jay Leno during a July 2004 recording of the program.

© Getty Images 

Bobby Riggs and Billie Jean King -

Bobby Riggs and Billie Jean King shake hands after King defeated Riggs in straight sets to win the so-called "Battle of the Sexes" at the Houston Astrodome in 1973. Despite his age, 55-year-old Riggs still believed he could beat his 29-year-old opponent. King's win is considered a milestone in public acceptance of women's tennis.

© Getty Images 

Yitzhak Rabin and Yasser Arafat -

Israeli Prime Minister Yitzhak Rabin, US President Bill Clinton, and Palestinian political leader Yasser Arafat at the Oslo Accords signing ceremony in Washington, D.C. in September 1993.

© Public Domain 

Herbert Hoover and Franklin D. Roosevelt -

Gracious in defeat, US President Herbert Hoover (left) shakes hands warmly with his successor Franklin D. Roosevelt at Roosevelt's inauguration in Washington, D.C in 1933.

Sources: (National Geographic)(Smithsonian Magazine) (Tennis Majors)

See also: The most bizarre gifts ever given to US presidents

© Getty Images