Today is James Maslow's 25th birthday! It's pretty hard to believe that the former Nickelodeon star is already in his mid-twenties. Especially since he was playing a high school student on Big Time Rush just two years ago.
But he's not the only cast member who seemed to grow up out of nowhere! Click through the gallery to see what the actors from the show are doing now, then let us know in the comments below who you think looks the most different!