It's crazy how much things change in such a relatively short amount of time. Everything in the world goes through changes and phases. From fashion to films to celebrities, just about everything that is popular now was once not even a thought in the past. It's cool to look back on what was trending in the past. Even just 20, 30, or 40 years ago the world and society were totally different. There are some iconic figures who shaped the way the world is today, and it's fun to see what they looked like back then.

Nothing is lost as long as the Internet is around. Even though many of these images are old, they have since been put on the web to be remembered forever. These kinds of images might trigger some nostalgia for the older crowd, and they might seem totally foreign to many youngsters.

Here are 25 images of old-school celebrities and what they were up to several decades ago. See just how much they have changed since their younger years.