If you don't already have a crush on Matthew Gray Gubler, allow us to change that. The Criminal Minds actor, 36, has been charming audiences as Dr. Spencer Reid since 2005, bringing both his sexy and geeky charm to the thrilling show. But while we've seen so many of his hottest moments on the red carpet, at fancy events, and promoting the hit show with his costars, he also has a really strong presence on social media. In addition to taking perfect selfies, Matthew has gained more than 1 million followers by showing off his goofy smile, admitting his deep love for Fall and Halloween, and never taking himself too seriously. Keep reading for his best Instagram snaps!