It's not enough to have good thoughts for the world. You must get out there! It is also really important that each person realise their own worth. If you don't think you're good enough, how can you turn around and help save the world?

The biggest danger we face is overfishing. We literally could fish out our oceans, some scientists believe, in the next 40, 50, 60 years. We are fishing out the top of the food chain, and it's pretty crucial because about 200 million people depend on fish and fishing for their livelihood, and about a billion people, mostly in poorer countries, depend on fish for their protein. So this is a big problem. Good news is, it's fixable.

One person goes off and works in Houston the other person goes off to London and you're on the phone to each other and somebody is paying you to kiss somebody else. It's very bizarre being an actor.

It is important to remember that the ocean's resources are finite. The commitment these kids are making here today is a clear and compelling call to all of us to pay attention to our ocean.

I am forever grateful for Cheers.

I don't get a sense that Cheers is revered the way it should be by [younger viewers]. In my mind, it's a show that should always, always, always be in the pantheon. But can it ever mean to future generations what it meant to us?

I don't know if I went to the gym, [but] Woody [Harrelson] was 24, and at that point I was like 37, which is when you realize you're no longer 24. So in walked Woody, who was instantly great, but offstage, it was [all] testosterone. We'll arm-wrestle. I still have, like, tendinitis in my elbow. Woody cleaned everybody's clock in everything. Then we got less physical and went to chess, and he whipped our asses with chess.