Sonakshi features in a TV commercial which is already on air.
"We could think of no one better than Sonakshi Sinha to be the face of Flite as she has become a style icon for today's youth," Gaurav Dua, executive director, Relaxo Footwears Limited, said in a statement.
"Her style statement is very relaxed, funky yet chic and Flite perfectly complements that.
"We are happy to have Sonakshi on board to enhance our connect with the youth and masses," he said about the "Rowdy Rathore" star, who recently made her Tamil debut with "Lingaa".
She will be soon seen in "Tevar".