Jessica and Ashlee Simpson launch clothing line

Jessica and Ashlee Simpson launched their girls' clothing line at Dylan's Candy Bar yesterday (91.12.11).

Jessica and Ashlee Simpson launched their girls' clothing line yesterday (01.12.11).

The sisters - along with Jessica's fiance Eric Johnson and Ashlee's three-year-old son Bronx - mingled with the young guests at Dylan's Candy Bar as the T-shirts, shoes and jeans went on sale for the first time.

Proceeds from the sale of a specially-designed T-shirt will go to Baby Buggy, a charity founded by Jessica Seinfeld, while there are plans for an online design contest for a t-shirt to be included in the forthcoming back-to-school collection.

Describing the new range, which is released through the Jessica Simpson label, pregnant Jessica said: "It's a combination of both of our styles. Ashlee is very rock 'n' roll, and I'm very American."

Jessica also revealed she has signed a deal for a maternity line and will also design girls' footwear.

She also admitted she may branch out further if she discovers she is expecting a son.

She told WWD: "Boys' clothing is a possibility."

As well as awaiting the birth of her baby, Jessica is currently working on her spring 2013 women's collection, which she joked is so far out "my baby will be one".