Kate Hudson is at the sharp end of a bizarre new lawsuit - bosses of a haircare company have accused her of stealing their volcano ash.

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 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.