Lille won the Ligue 1 title with a 2-1 victory at Angers, which ensured they were crowned French champions for the first time since 2011.
Lille manager Christophe Galtier labelled his players "heroes" after the Angers win on the final day of the season on Sunday.
An early Jonathan David strike and Burak Yilmaz's penalty in first-half stoppage time ensured that Lille finished one point ahead of second-placed Paris Saint-Germain, who won 2-0 at Brest.
Angelo Fulgini pulled one back in added time, but the hosts could not stop Lille from becoming champions for the fourth time in their history.
The match was played behind closed doors due to Covid-19 restrictions but fans thronged the streets of Lille to celebrate at the final whistle.
Supporters lit flares and chanted songs in the northern city's central Place Charles de Gaulle in jubilation at a historic triumph against far wealthier opposition.
"The players were amazing ... the credit goes to the players, they are the heroes," a jubilant Galtier said to Canal+.
