Madonna is set expand her fashion line to include swimwear.

The 52-year-old singer recently launched teen clothing range, Material Girl, with 13-year-old daughter Lourdes and the pair are keen to add more categories to their collection.

A spokesperson for the line said: "We're focused on rolling Material Girl out into additional categories, including swim and intimates and expanding the dress assortments. We launched footwear with ballet flats this season, but we're going to expand into a full footwear collection going forward. It's all under discussion."

Madonna has previously revealed she loved working with Lourdes, but admitted they didn't always agree on everything.

Speaking about her daughter, she said: "I think we complement each other but we do disagree on a few things. I wouldn't have worn this flannel shirt thing but she looks good in it so what are you going to do. I'm a very proud mother."

The collection - modelled by 'Gossip Girl' star Taylor Momsen and available to buy at US store Macy's - consists of clothes, footwear, handbags, jewellery and accessories.