The actress will endorse the brand's women's line of clothing and accessories and will feature in the new brand campaign.
"My generation looks forward to new trends and fast-moving styles, and we want to see new merchandise almost every week. I am happy to be associated with a brand that is young, chic and voguish and its range and designs keep pace with my frequently changing style," Kriti said in a statement.
Anurag Rajpal, CEO of American Swan, said he wants to reach out to the fashion-forward youth and Sanon represents today's young women who are well-groomed, trendy and have their own distinct dressing sense.
"Our clothes are about dressing smart and fashionably in casuals and Kriti Sanon is a perfect fit for our brand and the new collection," he said.