Back in the 1970s, 80s, and 90s, street photographer,

Almost 40 years later, Porsz has spent hours on end, tracking down those people to create real life before and after photos of them.

ALSO READ: Photographer thrills fans with daredevil 'roofing' selfies [Photos]

The gig resulted in 135 beautiful reunion photos and the transformations are stunning.

Although one or two people who died over the course of the last 40 years, were replaced with siblings or children, the effect was no less remarkable.

Porsz who photographed everyone from police officers to street punks, from lovers to siblings, has put the photos together in a book he titled 'Reunion', with short texts by writer, Jo Riley, telling the stories of the people in the pictures.

ALSO READ: Professional photographers capture the miracle of childbirth with moving photos

We have gathered 10 of these remarkable before and after photos. Take a look in the photo gallery above.