But in the last few weeks, this little fighter celebrated his first birthday and received his official designation as the world’s most premature baby from Guinness World Records. This isn’t a record that Nash’s parents, Randall and Mollie Keen, wanted to break, but they’re thrilled to have an extra reason to cheer for their son.

A 1-year-old who was born at 21 weeks has been named the world's most premature baby by Guinness World Records.

A baby born at 21 weeks' gestation in Iowa City, Iowa, has celebrated his first birthday, earning a Guinness world record for being the most premature baby.