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Jason Priestley is mourning the loss of a beloved, longtime friend.
"It's taken me a couple of days to figure out how to write this," the star began. "My dear friend of 29 years, Luke Perry, was one of those truly special people who really cared... Luke was not only a star, he was an incredibly bright light that was extinguished far too soon... and that is why I, and so many others, are in so much pain today... If you had the good fortune to know Luke, or to have ever crossed his path, I know you are sad today as well."