McDonald's first national advertising campaign in 1948 featured Speedee as its mascot.
Speedee was a small chef character based on the restaurant's original Speedee Service System. The system emphasized fast, standardized food preparation, so the mascot communicated speed and consistency rather than the family entertainment associated with later McDonald's branding.
The Speedee character predates Ronald McDonald and the McDonaldland characters. McDonald's later shifted its visual identity toward the Golden Arches and family-oriented characters, making Speedee less familiar to modern customers. The name is sometimes confused with the later Hamburglar or with restaurant slogans, but Speedee was the early mascot tied directly to the company's service model.