Actors who played their polar opposites on-screen
Taylor Momsen - Jenny from 'Gossip Girl' is a pretty girl who will do anything to impress her pretty friends.
Taylor Momsen - Momsen, on the other hand, is lead singer of the rock band The Pretty Reckless.
Ariana Grande - Grande had her break playing Cat Valentine, the airhead drama queen in the Nickelodeon TV series 'Victorious.'
Ariana Grande - In real life, Grande has a fierce personality, which shows in her growing involvement in social activism.
Brenda Song - In 'The Suite Life of Zack & Cody,' Song plays the ditzy heiress of the Tipton hotel.
Brenda Song - But Song is actually pretty smart. She earned her high school diploma at age 16, and was named an All-American Scholar in the ninth grade.
Dave Franco - Franco is known for portraying jerks, like Greg in 'Superbad.'
Dave Franco - Franco is actually artistic and in touch with his feelings. He even writes poetry! Franco has said he's trying to avoid those "a**hole roles."
Selena Gomez - In 'Getaway,' Gomez plays The Kid, a gun-yielding car expert.
Selena Gomez - The sweet-tempered actor and singer is a people person who does what she can to connect to her fan base.
Jennifer Lawrence - In 'Silver Linings Playbook,' the actor portrays Tiffany Maxwell, a young widow who suffers from depression.
Jennifer Lawrence - In real life, JLaw is known for her candid honesty and bubbly personality.
Bryan Cranston - Walter White (left) from 'Breaking Bad' is one of TV's most notoriously cold-blooded drug dealers. He doesn't let anything get in his way, including human life.
Bryan Cranston - The actor is actually hilarious. He's also sensitive, evidenced by the fact that he cries when he talks about the scene in which Mr. White watches Jane die.
Danny Trejo -
Trejo specializes in villains and antiheroes, like his characters on 'Breaking Bad,' 'The X-Files,' and 'Sons of Anarchy.'
Danny Trejo - But Trejo is actually a family guy and businessman, who owns several ventures in the food industry.
Rami Malek - Malek perfectly depicts the socially awkward and depressed hacker Elliot Anderson in 'Mr. Robot.'
Rami Malek - But Malek is actually a chatterbox who thrives "on affection."