Captain Crook was the pirate advertising character who appeared alongside Ronald McDonald.
Captain Crook was one of the recurring figures in McDonaldland, the fictional world used in McDonald's advertising from the early 1970s. His design and stories connected him with Filet-O-Fish sandwiches, while other characters were associated with different menu items or playful roles. The character helped expand McDonald's branding beyond a single mascot.
Captain Crook is sometimes confused with the Hamburglar because both were mischievous figures in the same advertising universe. The Hamburglar was associated with hamburgers, whereas Captain Crook was the pirate character linked to fish sandwiches. McDonaldland's cast was later reduced as McDonald's advertising moved away from its large ensemble of fantasy characters.