Bolt's hot girlfriend, Kasi Bennett

Meet the fastest man in the world’s “First Lady”.

Usain Bolt’s girlfriend is gorgeous Jamaican fashionista Kasi Bennett.

The 26-year-old beauty wasn’t in Rio to witness her berk winning a historic “triple triple” gold medals in the 100m, 200m and 4x100m relay events.

But Kasi, who has apparently been dating Bolt for two years, has been flooding her Twitter feeds with messages about her “baby” throughout the games.

Following his success in the relay final, she captioned a picture of Usain kissing his medal “Track immortality”.

After Bolt won gold in the 200m, she tweeted: “This level of pride is unfathomable.”

While Bolt previously said the couple were pretty “low key” he did give a shout out to his girlfriend earlier this year when he shared a picture of them together in New Kingston.

Referring to the lovebirds as “President and First Lady” as they pose next to a quad bike, it’s clear that Bolt is proud of his other half.

His taanie would certainly be pleased if he did tie the knot, telling CNN last week that she’s ready for grandchildren: “I would hope he’ll settle down, get married and start his family.

“I know he’ll settle down because he has said it. He told me many times that he’s going to start his family.”

Kasi is not sprinting into labour any time soon, though.

When a fan urged Kasi to get “Usain Jr” on the go, she replied: “you have quite the wait lol” (sic).