Marvin the Paranoid Android

Marvin the Paranoid Android is exactly that. He’s constantly depressed, as a result of being a prototype robot with GPP (Genuine People Personality). His brain is the size of a planet, which only makes him more bored and consequently depressed. He serves as help to Trillian and Zaphod and eventually meets Arthur and Ford on the spaceship Heart of Gold, accompanying them in their adventure.
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Alan Rickman

Alan Rickman is an English actor born in 1946. He has participated in numerous theatre productions, but is most famous for his portrayal of Severus Snape in the Harry Potter series, as well as his roles in films such as Robin Hood: Prince of Thieves, Die Hard, Dogma, Love Actually, Sweeney Todd: The Demon Barber of Fleet Street, Tim Burton’s Alice in Wonderland and The Butler.