Answer: Peter Cushing
Cushing, a native of Surrey, England, played General Grand Moff Tarkin for "Star Wars Episode IV: A New Hope". Tarkin was the one whom Leia said "held Vader's leash". Tarkin approached Leia about giving up the name of the system where the rebel base, that had plans to eradicate The Death Star, was. Tarkin told Leia that, if she did not name the location of the rebel base, he would blow up her home planet of Alderaan. Leia gave Tarkin the name of the location where the rebel base was but Tarkin ordered Alderaan to be destroyed anyway. It later turned out that Leia had given the wrong location and had not betrayed the Rebellion. Cushing was also in the films, "Shock Waves", "Son of Hitler" and "Top Secret!"