All eight defendants over the July 2016 lorry attack in the southern French city of Nice in which 86 people were killed have been found guilty.
Seven men and a woman were sentenced by a special court in Paris to jail terms ranging from two to 18 years.
Three were convicted of association with a terrorist, while five others were found guilty of supplying weapons.
The attacker, Mohamed Lahouaiej-Bouhlel, was shot dead after driving a lorry into crowds on Bastille Day.
The 31-year-old Tunisian ploughed through a crowd of some 30,000 people who had been enjoying a fireworks display for France’s national day on 14 July.
Hundreds of people were injured in the massacre – one of the worst attacks in Europe in recent years.