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The cards are usually stacked against unknown and new actors and actresses, just like the shows they're in. The industry doesn't have the patience it once did for untested programming to build an audience. And today, new faces have it even tougher as established movie stars have navigated their way to the top roles in TV, from Jennifer Lopez to Vince Vaughn.
But there's always a select number of talents who break away from the pack. We've chosen a handful of stars who have done just that. They were able to transcend the pressure like new "Daily Show" host Trevor Noah, or brought something unexpected out of a well-known role like Melissa Benoist on "Supergirl."
Here are 13 of TV's fastest-rising stars of 2015: