Matthew Perry Shares How People Will Know If He's Relapsed, Recalls Having First Drink at 14

After many years of struggling with addiction and amid his sobriety journey, Matthew Perry is revealing how people will know if he's relapsed. During a sit-down interview with Diane Sawyer on ABC News, which aired on Friday, the actor -- who was promoting his upcoming memoir, "Friends, Lovers, and the Big Terrible Thing" -- opened up about his battle with drug and alcohol addiction, including the warning signs that will tell people he's in "trouble." "How will we know when you're in trouble, whe...