Alyssa Milano is devastated by the death of her ex beau Corey Haim.
"Just woke up to the sad, sad news that Corey Haim passed away. RIP sweet boy," the actress -- who dated Haim from 1987 to 1990 -- wrote on Twitter Wednesday morning.
PHOTOS: Look back at Corey Haim's life
Haim — who was best known for 80s films including License to Drive and the Lost Boys -- was found dead early Wednesday morning of a suspected drug overdose. Read about his troubled past here.
Milano, 37, isn't the only celeb reacting to Haim's death on Twitter.
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"Rip Corey Haim 'Childhood hero,'" wrote Ashton Kutcher.
"My thoughts go out to Corey's family and friends today. So sad," added Christina Applegate.
Said director Kevin Smith, "Lost Boy goes home: Corey Haim, dead at 38. G'bye, LUCAS. You gave hope to the weird & unlikely.
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Melissa Joan Hart was shocked by the news. "No way! I just saw him last week at a Lupus event!" she wrote.
Cheetah Girl Adrienne Bailon, "Wow... One of my favorite movies growing up was "License to drive". How many people have to die for us to see that drugs KILL? #RIPCoreyHaim
Chelsea Lately's Loni Love wrote, "Hollywood can be a land of dreams ... but for most, it can become a land of nightmares ... don't believe the hype ... R.I.P. Corey Haim."
"I always dug the young funny corey haim.....wish he could have enjoyed life a little more than he did," comic Sinbad Twittered.
The Los Angeles Coroner assistant chief confirmed to UsMagazine.com Wednesday that four prescription drug bottles were removed from Haim's North Hollywood apartment.