Bolt announced the news on Instagram with a lightning bolt emoji next to each of his children’s names – Thunder and Saint Leo Bolt.
The Olympic champion posted a photo of him and partner Kasi Bennett, with their twin boys and one-year-old daughter Olympia Lightning.
The couple did not say when exactly the twins were born.
Bennett also posted a photo with the babies, saying Bolt was “the rock of this family and the greatest daddy to our little ones”.
Olympia Lightning, their first daughter was born in May 2020, and her name was announced publicly two months later.
Before her birth, Bolt had kept followers updated of Bennett’s pregnancy on his social media. However, neither he nor Bennett had posted about her pregnancy with the twins.