
A new exhibition at In Focus gallery in Cologne, Germany is displaying celebrity photographs shot by some of the world's most acclaimed photographers. Here, Abe Frajndlich captured pop artist Roy Lichtenstein.

Muhammad Ali puts forward the fist that made him famous in this 1966 shot by Thomas Hoepker.

Arnold Newman photographs the legendary Pablo Picasso staring intently into the camera.

A 1946 chocolate advert sees a young, red-haired Marilyn Monroe photographed by Bruno Bernard, also known as Bernard of Hollywood. Bernard was known for his images of Hollywood pin-ups.

Another image of a slightly older, slightly blonder Monroe, this time by Elliot Erwitt.

Known for her roles in "L.A. Confidential" and, more recently, "50 Shades Darker" Kim Basinger was once a fashion model. She is photographed here by Greg Gorman.

Political figures also featured in the exhibition. This portrait of Che Guevara was shot in Havana, Cuba.

Andy Warhol was more likely to be behind the camera taking iconic images of the world's most famous celebrities than in front of it. However, Greg Gorman managed to get a photograph of a sunglasses-wearing Warhol.

In this photo from Harper's Bazaar, we're taken behind the scenes of Alfred Hitchcock's hit movie "Psycho." Posing with model Ina Balke, Hitchcock plays up to the camera for photographer Jeanloup Sieff.

Jeanloup Sieff took this 1985 photo of actress Charlotte Rampling.

French singer Yves Montand smiles at Sieff's camera under from under a lowered brim.

German writer Siegfried Lenz chews on his pipe in this image by Karin Szekessy.

Chairman Mao Zedong, photographed by Marc Riboud, is pictured in 1957 clinking glasses.

Patrick Demarchelier, who remains one of the world's most sought-after celebrity photographers, shoots a young Michael Douglas in 1985. Two years later, Douglas would receive critical acclaim for his role in the thriller "Fatal Attraction."


