Natalie Portman
Natalie Portman first leaned to ride for the film The Other Boleyn, in which she played the role of Anne Boleyn the second wife of henry the eighth, below you can see a clip of Anne flirting with the king while on horseback.
After learning to ride for the role of Anne Boleyn, she caught the equestrian bug, after filming she decided to go riding in Kenya while of holiday, when asked is she could ride, Natalie confidently said yes, unfortunately when she got on the horse she was immediately thrown from the horse, Natalie soon realised that the horse from the movie were expertly well trained and she would have some more learning before she was able to call herself a horse rider. Since then Natalie has continued riding and has improved herself to become a keen rider.