Cast
Rob Schneider as Norm. Ken Katsumoto stated that the film's writing and production team wanted Norm to be like Rudolph the Red-Nosed Reindeer; much like how Rudolph perceived his red nose as a disadvantage for him but later helped Santa and saved Christmas, Norm sees his ability to communicate with humans as a negative, but it later ultimately saves the Arctic from Mr. Greene. According to Lionsgate's press release, Schneider was cast by the producers for the role of Norm due to his "vocal warmth and spot-on comedic instincts". Katsumoto explained that they "immediately fell in love with Rob's voice. His vocal dexterity was amazing. He also did a great job of embellishing lines to make them funnier. Many of those ad-libs made it into the film". As Schneider himself described Norm: "I always play the guy you can laugh at and say, 'My life's not that great, but look at that guy!' I think in this movie, other bears look at Norm that way. No one takes him seriously, but he follows his heart and it ends up saving their home. It's fun to play somebody who tries to achieve something big and ends up getting rewarded because he's not doing it for himself. That's a nice lesson for kids".
Heather Graham as Vera Brightly. The producers listened through numerous actress auditions for the part of Vera, looking for, in Katsumoto's words, a performance that was "fierce but sensitive at the same time".
Ken Jeong as Mr. Greene. Jeong voiced Mr. Greene because he wanted to show his twin daughters a film that he starred in: "Most of the movies I do I can't show my kids yet. With Norm of the North, they'll finally be able to watch one of Daddy's movies. That was kind of a big incentive for me to be part of this project". Katsumoto explained why Jeong was chosen for the role: "We fell in love with the fact that Ken can be villainous and likable at the same time. He's got incredible comic timing and spontaneity. Ken also has a lot of great subtext in his voice. Some people at advance screenings of the movie have cited Mr. Greene as their favorite character. That's rare for a villain". Jeong described Mr. Greene as "a 50-year-old billionaire with a ponytail, and that's pretty much all you need to know. He's this misguided person who starts out with good intentions. He loves to meditate. He tries to incorporate these New Age concepts into his thinking until things go horribly awry".
Maya Kay as Olympia Brightly, Vera's teenage daughter. Kay previously did voice acting for another animated film by Lionsgate, Alpha and Omega (2010). Kay said that she enjoyed voicing the character and working with Graham: "I was super excited to have Heather Graham play my mom – just like Vera, she's one of the sweetest people you'll ever meet". She also explained that "it was really awesome to play somebody so smart, with good intentions to help Norm save his home".
Colm Meaney as Norm's grandfather
Loretta Devine as Tamecia
Gabriel Iglesias as Pablo and Stan
Michael McElhatton (US) and James Corden (UK) as Laurence
Bill Nighy as Socrates, an intelligent seagull
Salome Jens as Councilwoman Klubeck
Charlie Adler as Forebear
G.K. Bowes as Female Tourist
Debi Derryberry as Daughter
Ben Diskin as Chef Kozawa
Keith Ferguson as Human Tourist
Dan Gordon as Nigel, Henchman #1, PA
Jess Harnell as Male Tourist
Kate Higgins as Elizabeth
Mikey Kelley as Henchman #2
Rove McManus as Junior Investor
Emily Polydoros as Bratty Girl
Eric Price as Caribou #1, Caribou #2
Nick Shakoour as Costumed Bear
Max Spitz as Teen Bear #1
Janet Varney as Janet
Rick D. Wasserman as Henchman #3
James Corden as Employee #1
Director Trevor Wall provides the voice for the three main lemmings in the film, although he is not credited. As Nicolas Atlan described the lemmings: "We thought it would be hysterical to combine Norm, the largest creature in the Arctic, with lemmings that are small and indestructible. They can get squashed, they can get stomped on, they can have an elevator close on them, but like Silly Putty, they bounce right back into their original shape".