Because you like Doogie Howser in Doogie Howser, M.D.

Josh Lucas just can't stop hanging around his stepsister's house. See them in Clueless.

Pengiuns, turtles, and all things scientific is where Sam's expertise lies. Girls are uncharted territory, but Sam is trying to branch out. See them in Atypical.

The party never really ends with Penny Lane, a rock-worshipping groupie who is refreshingly self-aware and free-spirited. See them in Almost Famous.

Chuck Bartowski is a sweet, laid-back electronics store/top secret government employee. See them in Chuck.

Once described as a "beautiful, tropical fish," Ann Perkins exudes warmth, and unlike most of her friends she also has common sense. See them in Parks and Recreation.

A suave manipulator, Sebastian Valmont is valiantly fighting off a developing conscience. See them in Cruel Intentions.

Peter Kavinsky is a jock who only cares about getting back at his ex, or so he says. See them in To all The Boys I've Loved Before.

As Marlena Rosenbluth is finding out, confidence in the limelight doesn't always translate to power at home. See them in Water for Elephants.

The seasoned detectives in River Heights have got nothing on amateur sleuth Nancy Drew. See them in Nancy Drew.

Relentlessly cheerful and optimistic, Erin Hannon is an office receptionist. See them in The Office.

Tina Cohen-Chang is a shy loner who becomes a fierce performer on stage. See them in Glee.