Kate Hudson leaving a restaurant on Ocean Avenue in Santa Monica after having lunch with her mom and Lance - Los Angeles, California - 01.07.08

220 Labs bosses claim the actress stole their idea for a secret volcano ash hair product.

In a lawsuit, filed in Los Angeles on Friday (22Aug08) and obtained by TMZ.com, the plaintiffs claim Hudson took a sample they gave her and created her own line of products, which she even promoted on U.S. cable shopping channel HSN.

Lawyers for 220 Labs are demanding unspecified damages.

Source: WENN