A Nepalese fruit seller's son with the body of a toddler turned 18 on Thursday and was officially declared the world's shortest man by Guinness record officials.

Khagendra Thapa Magar measured in at 26.4 inches, displacing the former record holder, Edward Nino Hernandez of Colombia, who measures 27 inches.

Cheers went up when Magar was handed a world record certificate by Guinness official Marco Frigatti. The ceremony was held in a hotel in Pokhara, Magar's hometown and a popular tourist destination west of Katmandu.

"I can confirm that as of today Khagendra Thapa Magar is officially the shortest man in the world," Frigatti announced as he handed over the certificate.

Magar's family has campaigned for years to get him the crown, but earlier requests to Guinness were rejected because of the possibility he might grow.

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"We had to wait till he was 18 and became an adult," Frigatti said.

On Thursday, Magar and his family excitedly welcomed journalists to their home, where Magar jumped on the kitchen table and made tea for the visitors and family members. He also received presents for his 18th birthday and danced to the sound of a toy drum.

Magar, who weighs 12 pounds, 5 ounces, was tiny even at birth, weighing just 1.3 pounds. His father says he has no explanation for why he never grew taller — his younger brother is a normal height for a boy of 13.

Local doctors are stumped, but lack facilities for detailed testing.

"His body structure is like that of a small child, and he also thinks and behaves in that manner," said Magar's doctor, Hum Prasad Newpane.

Next year he is to serve as a government-appointed goodwill ambassador as his nation celebrates Visit Nepal Year.

"I am very happy and excited," he said.