I always felt that Luke Perry and Jason Priestley looked like they were brothers.

I graduated JHS the same year that Dylan, Brandon and the gang graduated high school. Fun fact: according to IMDb, the first episode of the 4th season (the beginning of their college years) actually premiered on the same day as my first day of high school. Although, I didn't start watching the series until the very day Luke Perry passed away, as the media coverage of his death prompted me to see what all the hype was about 90210. So I binge-watched it on Hulu, which was exhausting since about 60 of the 292 episodes aren't available due to music licensing rights. Therefore, I was forced to jump back and forth from my HDMI TV (Hulu) to my iPad (illegally uploaded episodes accompanied by annoying popups). But it was so worth it that I gave every episode a second go-round. Now that I'm familiarized with the series, I gotta say that my eyes have deceived me, because Luke and Jason definitely don't look alike. Although, I sometimes beg to differ with some of the photos they've taken together for the teeny bopper magazines. Google "Luke Perry Jason Priestley" and you'll see what I mean.