Lindsay Lohan has "offended" a designer boutique after demanding free clothes.

The Irish-American actress has upset exclusive Los Angeles boutique Kitson, which stocks Lohan’s leggings line 6126, after she reportedly demanded $15,000 in free merchandise from a shop assistant earlier this month.

Store owners are displeased with the 23-year-old's demands because she reportedly failed to fulfill her promotional duties after they splashed out a huge sum on stocking her leg-wear range.

A spokesperson told Fox News: "We're actually really offended. The tables have turned and now we're the customer.

"We spent $50,000 on her leggings line, but she hasn't come to the store in three years, and she didn't even do a personal appearance.”

Staff at the shop, which is on Robertson Boulevard, has now threatened to withdraw the collection from their store.

The source added: "She should have brought cookies for the staff to thank them for selling her leggings because she does nothing. We don't know if we'll continue to carry them."

Lindsay Lohan has sparked a feud with designer boutique Kitson