FinnishLapphund
There's no cow on the ice
Have not read whole thread but can only think of 2 actors who actually ride: viggo mortensen and William shatner ?
Also CI is right about the lotr stunt double, but mortensen bought the stallion for the stunt rider and one of the horses he rode for himself apparently.
Mortensen bought 3 horses, besides the horse he gave to the stunt woman, he bought the chestnut, Kenny, who played Hasufel, which Aragon/Mortensen rode in the beginning of the Two Towers, and the brown horse Uraeus (spelling?) who played Brego.