Because you like Alex Karev in Grey's Anatomy

Shy and nerdy, Gabriella Montez moved to Albuquerque and quickly became the toast of East High and a darling of the stage. See them in High School Musical.

Self-described as half-Slytherin, half-Ravenclaw, Molly Davidson has a big, demanding personality that doesn’t always leave space for other people’s emotions. See them in Booksmart.

There can be no doubt that Ben Linus is a huge liar. But one man's lies are another man's necessary steps to protect his people. See them in Lost.

Cat Grant gets what she wants: a piping hot latte or an interview with Supergirl. See them in Supergirl.

Troy Bolton is a triple threat: singing, dancing, and basketball. See them in High School Musical.

A meek schoolteacher, Mary Margaret Blanchard can't remember her past as a spirited, swashbuckling Snow White. See them in Once Upon a Time.

Driven yet empathetic, Emily Prentiss brings humanity to the pursuit of inhuman killers. See them in Criminal Minds.

Matt Flamhaff is not too concerned about being part of the popular crowd. Too bad his best friend is. See them in 13 Going on 30 .

Logan Huntzberger is a daredevil, romantic, and heir to a media empire. See them in Gilmore Girls.

Stubborn, impulsive, and fun-loving, Hallie Parker is not afraid to devise some schemes to bring her family together. See them in The Parent Trap.

Raven Reyes may be a deliquent, but she's also the youngest zero-gravity mechanic who fixed a 130-year old escape pod to make it through the descent to Earth. See them in The 100.

Short on book smarts but long on compassion, this high school football player secretly has a soulful side. See them in Glee.