Zaphod Beeblebrox is a fictional character in Douglas Adams' comic science fiction series 'The Hitchhiker's Guide to the Galaxy.' He is depicted as a two-headed, three-armed Betelgeusian alien from Betelgeuse V, known for his narcissistic, hedonistic, and irresponsible personality. Zaphod served as the President of the Galaxy, a position he assumed through charm and audacity rather than merit. He is infamous for stealing the starship Heart of Gold, equipped with the Infinite Improbability Drive, and embarking on adventures across the galaxy alongside companions like Arthur Dent, Ford Prefect, and Trillian. His exploits include searching for the lost planet Magrathea and inventing the Pan Galactic Gargle Blaster, a potent alcoholic beverage.

Zaphod's early life involved complex family ties, being a half-semi-cousin to Ford Prefect through shared mothers, and a bizarre ancestry loop caused by a time machine accident involving contraceptives. He headed the Beeblebrox Salvage and Really Wild Stuff Corporation before his presidency and was involved in investigations with the Safety and Civil Reassurance Administration. Despite his self-proclaimed genius, Zaphod often pretends to be stupid to manipulate situations, leading to chaotic but successful outcomes. His character embodies absurdity and improbability, central themes in Adams' work.

Portrayed in various adaptations, including radio, TV, and the 2005 film where he was played by Sam Rockwell, Zaphod remains an iconic figure of irreverent sci-fi humor. A real-world nightclub in Ottawa, Canada, was named after him, hosting notable performances before closing in 2017.