Lady Isabella Frederica Louisa Hervey (born 9 March 1982) is a British socialite, model, and actress. She is the youngest 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 appeared as a contestant on Celebrity Masterchef, and more recently in the UK Sky One television programme Vroom Vroom.

She was awarded Sexiest Aristocrat in May 2006, and made the 62nd spot in FHM’s 100 Sexiest Women in the World.

Lady Isabella has been romantically linked with various men