<P> As a result of Finn's father allowing Finn's younger sister to join them in playing with his Lego sets, aliens from the planet Duplon beam down on the Lego world and announce their plans to destroy everyone . </P> <Ul> <Li> Chris Pratt as Emmet Brickowski, an everyman and construction worker from Bricksburg . </Li> <Li> Will Ferrell as Lord Business, president of the Octan Corporation under the name of President Business . <Ul> <Li> Ferrell also plays "The Man Upstairs", a Lego collector in the live - action part of the film . </Li> </Ul> </Li> <Li> Elizabeth Banks as Wyldstyle, a Master Builder who is Emmet's love interest and Batman's girlfriend, whose real name is Lucy . </Li> <Li> Will Arnett as Batman, a DC Comics superhero who is a Master Builder and Wyldstyle's boyfriend . </Li> <Li> Nick Offerman as MetalBeard, a giant makeshift pirate and Master Builder. . </Li> <Li> Alison Brie as Princess Unikitty, a unicorn - kitten and Master Builder from Cloud Cuckoo Land </Li> <Li> Charlie Day as Benny, a "1980 - something space guy" who is a Master Builder . </Li> <Li> Liam Neeson as Bad Cop / Good Cop, a double - faced police officer that leads the Super Secret Police . <Ul> <Li> Neeson also voices Pa Cop, Bad Cop / Good Cop's father . </Li> </Ul> </Li> <Li> Morgan Freeman as Vitruvius, a blind old wizard who is one of the Master Builders . </Li> <Li> Channing Tatum as Superman, a DC Comics superhero who is one of the Master Builders . </Li> <Li> Jonah Hill as Green Lantern, a DC Comics superhero who is one of the Master Builders . </Li> <Li> Cobie Smulders as Wonder Woman, a DC Comics superhero who is one of the Master Builders . </Li> <Li> Jadon Sand as Finn, The Man Upstairs' young son in the live - action part of the film . </Li> <Li> Graham Miller as The Duplo Aliens, aliens made from Duplo blocks that come from the planet Duplon . </Li> </Ul> <Li> Chris Pratt as Emmet Brickowski, an everyman and construction worker from Bricksburg . </Li> <Li> Will Ferrell as Lord Business, president of the Octan Corporation under the name of President Business . <Ul> <Li> Ferrell also plays "The Man Upstairs", a Lego collector in the live - action part of the film . </Li> </Ul> </Li>

Who is the voice of emmett in the lego movie