Andrew Koenig, best known for playing "Boner" on 'Growing Pains,' has been found dead in Vancouver's Stanley Park after a week-long search. In the wake of the family's tearful press conference, friends and colleagues have posted messages of support and sadness on Twitter, reaching thousands of fans at once. Fellow former teen star Alyssa Milano wrote, "If you know someone suffering from depression, please do everything in your power to get them help. R.I.P. Andrew."