Melissa Joan Hart grew up on TV, and millennials grew up watching her. From her breakout role on "Clarissa Explains It All" as a young teenager, to her time as America's favorite witch on "Sabrina the Teenage Witch," to becoming a queen of Christmas in Hallmark movies, the actor dominated the small screen for decades. Hart, a mom of three , has also built a career for herself behind the camera as a director of episodes of beloved sitcoms such as "iCarly" and "Young Sheldon." Hart has undergone a stunning transformation throughout her career in Hollywood, and looks much different now than she did as a teen actor. Side-by-side photos show just how much Hart has changed over the years.

Hart's bun in a '90s red-carpet look is whimsical (and very '90s), especially with the intentionally

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