Mary-Kate and Ashley Olsen already have several clothing lines under their belts, but this time, the trend-setting twins are targeting juniors with their new brand Olsenboye.

According to WWD, the Olsenboye line features casual sportswear, including denim, bottoms, tops, dresses, skirts, shorts, jackets, handbags and shoes. The collection will retail from $20 to $50 and offers sizes ranging from 0 to 15.

"Mary-Kate and I watch current trends and see our partnership with J.C. Penney as an opportunity to add something unique to the marketplace, especially in the current retail climate," Ashley said. "Olsenboye is an extension of the Dualstar brand and we feel this collaboration complements and strengthens our business portfolio, delivering trend-based fashion at affordable prices."

Olsenboy will be available in 600 J.C. Penney stores in February 2010.