Families rolled up to enjoy all the fun of the fair.
Loughborough Fair, now in its 791st year, features 20 large rides, games, novelty stalls and other attractions.
The fair was officially opened on Wednesday by Mayor of Charnwood Councillor Diane Wise, who took a spin on the waltzer.
Paul Harley, leisure spokesman for Charnwood Borough Council, said: "For nearly eight centuries, Loughborough Fair has been a highlight of our events calendar and even today it is as special and loved as ever.
"Not only does it provide attractions for residents, it also showcases the town and the borough to visitors – especially our international students who send pictures of this unique event to their families all over the world."
The fair's charter was granted to the Lord of the Manor, Hugh Le Despenser, in 1221 by Henry III. It was originally held in July, on St Peter's Day.
In 1881, officials obtained an order to stipulate that the opening day of the fair would always fall on the second Thursday in November.
Some roads have closed for the duration of the event, which runs until tomorrow.
For a map of diversions, see: