Answer
Sir Brian De Bois-Guilbert, portrayed by George Sanders in the 1952 classic "Ivanhoe," is a prominent character in the film. Sanders' portrayal brings to life the cunning, ruthless, and ambitious nature of Bois-Guilbert, a knight of the Templar order. As the story unfolds, Bois-Guilbert's unwavering pursuit of power and his unrequited infatuation with Lady Rowena shape his actions, leading to conflicts with the film's protagonist, Sir Wilfred of Ivanhoe.