Dwayne Johnson

I found that, with depression, one of the most important things you could realize is that you're not alone," the actor-wrestler, 43, said in a YouTube video posted by Winfrey's OWN channel Thursday. "You're not the first to go through it; you're not going to be the last to go through it. And oftentimes — it happens — you just feel like you're alone. You feel like it's only you. You're in your bubble. And I wish I had someone at that time who could just pull me aside and [say], 'Hey, it's gonna be OK. It'll be OK.' So, I wish I knew that.