The Lady Isabella Frederica Louisa Hervey (born 9 March 1982) is a British socialite and model/actress. She is the daughter of the 6th Marquess of Bristol and his third wife Yvonne Marie Sutton, half-sister of the 7th Marquess of Bristol, and Lord Nicholas Hervey, both deceased, and sister of the 8th Marquess of Bristol and Lady Victoria Hervey.

She is probably most well known for receiving a gold medal on the Channel 4 reality TV show The Games (2004), and for appearing as a contestant on ITV's Celebrity Love Island (2005). In 2005 she was named "face of Playboy UK".

She has also recently started in the UK Sky One TV programme Vroom Vroom.