The Hollywood actress became a hairstyle pin-up in the 1990s when her famous 'Rachel' cut made waves on hit TV sitcom Friends, and she later became a model for a L'Oreal shampoo line.
Aniston now looks set to build on her hair appeal by becoming an equity partner in a rising company called Living Proof.
The actress has invested in the firm and she will also become the face of the brand, starring in marketing and advertising campaigns, while she will also be involved in the creation of new products and package design.
Aniston admits it was the company's science-driven approach which encouraged her to become an investor.
She says, ""I have been approached many, many times (about this kind of deal)... You want to be part of something that's exciting and authentic. You can't get more interesting than these scientists... (I was) fascinated by the scientific approach.""
Living Proof chief executive Jill Beraud tells the Wall Street Journal, ""We believe that beauty and brains are the best formula. She (Aniston) represents everything we represent as a brand.""