Since his disqualification in the world championships final in Daegu twelve months ago questions have been raised as to whether Bolt's dominance in the event was over.
But he in a time of 9.63 second, which is a new Olympic record, he cruised to another Olympic sprint title.
Fellow Jamaican and training partner Yohan Blake took the silver while Justin Gatlin from America took the bronze.
The 100m final was one of the most highly anticipated events of the 2012 Olympic Games as only one man didn't run under ten seconds to reach the final.
The line up included Tyson Gay, the second fastest man of all time, and Asafa Powell, who has run under then seconds more than anyone.
Gay, who has struggled with injury over the last couple of years, was fourth while Powell limped over the line with what looked like a groin problem.
But all eyes were on Bolt and it was a cautious start but once he was up into his running there was only going to be one winner as he stormed through the field.
Bolt strolled through the first round on Saturday morning, barley breaking a sweat to reach the semi-final.
But it was in the semi-final at the beginning of yesterday evening where he really showed that he was on course for gold and he dominated the race.
And while everyone was talking about 'what if?' and 'could he be beaten?' Bolt was ready to reclaim his crown.
FemaleFirst Helen Earnshaw