Penny Lancaster-Stewart is an English model and photographer. She is probably best known for her modeling work for designer lingerie brand Ultimo. She is married to rock singer Rod Stewart, and is well known for her height, standing 6ft 2in (188 cm).

Penny Lancaster has a brother named Ben, and a pet dog named Alfie. Lancaster was brought up by parents who were both regular gym-goers and encouraged a love of fitness. At the age of six Lancaster took up dance, learning tap, ballet and modern but decided to quit at the age of 16 due to her height and decided aerobics would better suit her frame. Six years later Lancaster became a certified fitness trainer. It was during this time when she was spotted by a model scout who suggested she should consider a career in modeling. Lancaster also decided to learn about the other side of modeling and began taking photography classes.