Mary-Kate and Ashley Olsen's fashion line The Row shows us that when actresses moonlight as designers, it can actually work.

The twins are far beyond their Full House days, as their line celebrates its fourth year of classy and effortless designs.

Currently, the girls are at Paris Fashion Week launching their new handbag line for The Row. They hosted a cocktail party at Paris multibrand store Montaigne Market to commemorate the unveiling. 

Their new handbag collection includes a crocodile backpack that sells for $39,000, a price tag that is equivalent to the cost of a new BMW. But that does not seem to be stopping shoppers. It was the first thing that sold off the shelf, said Ashley Olsen, and the sisters are trying their best to keep up with demand. 

The designers' Spring 2012 collection uses a palette of mostly white and light pastels and exemplifies the dual touch of each girl's unique style. They debuted the line at New York Fashion Week. 

Mary-Kate's style is bohemian-glamour and vintage-inspired. Ashley's can be described as more polished and classic.

Together, the girls have come up with a line that is both contempo-casual and softly elegant.

Some of the best looks include a shift maxi dress with sheer silk lining the bottom; a shell top with slouchy linen pants; a silk kimono-esque dress; and a floral-embroidered cropped top with silk trousers.

Their inspiration came from a Seattle exhibition of Nick Cave's Soundsuits and the country of Tibet, according to Style.com.

We wanted everything to float and breathe, or make a sound, even, Mary-Kate explained afterward.

This collection proves to be a stark contrast to the one they currently have on the market for Fall 2011. Their Fall line is luxe and bold, complete with a black leather dress, a mustard yellow duster coat, a leopard goat hair coat and a motorcycle jacket.

Their collection can be found at all luxury department stores including Bloomingdales and Barney's, as well as online at TheRow.com and Net-a-Porter.