If you speak to any girl who grew up in the '90s, they'll all tell you about their massive crush on Jonathan Taylor Thomas. He played the mischievous middle brother, Randy, in Home Improvement, a popular comedy sitcom starring Tim Allen. Affectionately known as JTT, it seemed like his fame was only going to continue to soar.
We haven't even mentioned his other major role. He was the voice of Simba in Disney's The Lion King, which was pretty much the biggest kid's film of the decade. Thankfully, JTT didn't turn to drugs or alcohol and is still doing quite well for himself outside of the showbiz scene. He actually made the decision to leave acting to pursue his education at Harvard. He ended up getting a degree in art and history - who would have thought?