Emmanuel Laurent Petit (born 22 September 1970) is a French former professional footballer who played as a midfielder at club level for Barcelona, Monaco, Arsenal and Chelsea. He represented France at international level in two FIFA World Cups and two UEFA European Championships; he scored the third goal in France's 3–0 victory in the 1998 FIFA World Cup Final and was also a member of the French squad that won UEFA Euro 2000.

Petit was born in Dieppe, Seine-Maritime. Petit began his career at minor club ES Arques-la-Bataille before being signed by Arsène Wenger's Monaco side at the age of 18. He made his debut soon after and played in the 1989 Coupe de France final.