A 21-year-old man who has the body of a 160 YEAR-OLD is thought to be the world's oldest real life case of ‘Benjamin Button’. Rupesh Kumar, who weighs just 20kg, has aged EIGHT times faster than normal due to Hutchison-Gilford progeria. The condition affects one in eight million people and he is believed to be the oldest survivor after the death of South African Leon Botha at the age of 26. Rupesh, from Hanumanganj in in the north Indian state of Uttar Pradesh, was born normal but began to show signs of the condition as a young boy. His desperate parents have written to India's Prime Minister pleading for help as they struggle to cope. The disorder is said to have inspired the F Scott Fitzgerald novel and Brad Pitt movie The Curious Case of Benjamin Button, in which the character is born an old man and ages backwards.