<Li> Jane Lynch as Pat Stevens </Li> <Li> David Koechner as Gus, a hillbilly whom Graeme and Clive first encounter in a Nevada gas station . </Li> <Li> Jesse Plemons as Jake, Gus's friend . </Li> <Li> Sigourney Weaver as "The Big Guy". In an interview with Graham Norton, Weaver stated: "It's a love letter to sci - fi fans . I jumped at the chance to be in it . To find a comedy that also pays homage to sci - fi is a dream come true ." </Li>

Who plays the voice of paul the alien