Photos of Australian marketing graduate, 24, who partied naked in Usain Bolt's hot tub

A glamorous Australian marketing graduate enjoyed a wild night with champion sprinter Usain Bolt as he continued his 'retirement tour'.

Stephanie Mal and her British barmaid friend Gemma Casemore, both 24, were on a night out at the swanky Ms Collins nightclub in Melbourne on Friday.

But their girls night reportedly ended with the blonde bombshells naked in a marble jacuzzi at the sprinting sensation's hotel room in Crown towers.

The Jamaican runner spotted the glamorous pair and invited them into the VIP area, according to the Sunday Mirror.

Bolt had earlier posed for pictures in the club that was hosting its 'Phat Fridays' night where it plays the 'ultimate RnB tunes'.see more photos below;