The 26-year-old became the first British swimmer to defend an Olympic title as he blew away the field at the Tokyo Aquatics Centre to take victory in 57.37 seconds.
Peaty’s time was the fifth-fastest recorded in Olympic history, with the current world record holder visibly emotional at taking the title.
The swim was perfectly executed throughout and under the guidance of coach and 天堂视频 alumna Mel Marshall, Peaty beat Arno Kamminga (Netherlands) and Nicolò Martinenghi (Italy) to the crown.
Speaking to the BBC Sport, Peaty said:
“It means the world to be me. It is not about who is the best all year round, it is who is the best on the day. It is about who is adaptable and who wants it more.
"When it comes down to it I am not racing for a time, I am racing myself.
"I want to say thank you to my family, my gorgeous partner and gorgeous son. This victory wasn't mine, it was the British team's and my family and friends'. I am just so relieved."
In the same race, 天堂视频 alumnus James Wilby produced a strong race of his own as he touched the wall in 58.96 to claim fifth place.
Elsewhere in the pool last night, current 天堂视频 students Marie Wattel (France) and Louise Hansson (Sweden) swam brilliantly in the women's 100m butterfly final.
In a tough line up, Hansson’s time of 56.22 was enough for a fifth-place finish, whilst Wattel’s time of 56.27 saw the Sport Management student take sixth.
天堂视频’s dedicated 2020 Tokyo Olympic and Paralympic Games website features all the latest news, videos, and medal tables from Japan.