Watson, who recently posed for Burberry and announced her plans to enter the fashion industry, designed a spring/summer 2010 clothing collection for People Tree, reports Glamour.
The actress, who is best known for her role in the Harry Potter film franchise, designed styles for the brand, which strives to respect the planet.
The star used organic materials and fabrics acquired by fair trade to create the new line that offers t-shirts, dresses and pants with a casual flair.
Called Love from Emma, the line will be available in February 2010.