Usain Bolt has no regrets as he prepares to hang up his spikes.

He is also looking forward to watching the 2020 Tokyo Olympics as a spectator.

"For me it will just be a joy," the world's fastest man told AFP on Thursday. "It will be a joy to sit back and watch it and remember, and get that feeling about all those athletes competing at the Olympics.

"I look forward to just being an outsider and helping anyway I possibly can."

The reigning Olympic and World champion in the 100m and 200m will run his last race on Jamaican soil at the second annual Racers Grand Prix on Saturday at the National Stadium in Kingston.

Bolt has four events left before retirement - this weekend's Kingston meet, Ostrava on June 28, Monaco on July 21 and the August 4-13 World Championships in London.

Bolt, 30, drew the curtain on his Olympic career in August by sweeping the 100m and 200m sprint titles for a third successive Summer Games.

He has a reputation as a free spirit and as a prankster and that joy of life -- which comes out in his victory celebrations -- will be on display Saturday for what he intends to be a party.

"For me I am going to miss the crowd," says Bolt, who is known for his signature lightning pose in Olympic stadiums after winning gold.

"I enjoy playing with the crowd and the high energy. That is what I will miss about track and field."