George Clooney (52)
"I find that as you get older, you start to simplify things in general. By the time you get a subscription to [American retiree association] AARP, which I just got, you have some idea of who your friends are. .I look to the people I've respected most in the industry over the years. Paul Newman, for instance. I just loved the way he handled growing old on-screen.
"It's understanding that you're now basically a character actor. Which is fine, but you have to pay attention to it.
"It's like William Holden says in 'Network': "It's all suddenly closer to the end than to the beginning, and death is suddenly a perceptible thing to me, with definable features." I love that line!"
Gay Byrne (79)
"I would not have lived to the age that I am if I had not been living in Howth, because I walked a great deal.
"Within one minute of closing the front door, I could be on the cliff walk and have the place to myself. I like to have time to walk and I like to have time to cycle – I have a pushbike – and I like to ride my motorbike.
"I don't cycle on the pushbike as much as I used to, but I often put the bike in the car and drive to a scenic route. I'd do about 25 miles."
Bob Geldof (61)
"All things considered, my fifties were the best decade for me. You never expect that.
"I'm at the beginning of my old age, things get easier. The sexual, professional and economic imperatives are less.
"It's not less important, just less driven . . . I'm fairly lucky in that I've always looked like shite. [But] if you were a pretty-boy pop singer it would wreck you, growing older."
Liam Neeson (61)
"When I'm in the city, I do eight miles around the park with a walking partner.
"I do an extra loop – and the usual boring push-ups and sit-ups . . .
"As far as looking the part, I recall a quote from Burt Lancaster. Later in his career, he said you could tell the sort of movie he was working on by his hair. If he was in a studio film, he wore a wig. But if it was an art house movie, he'd show his bald spot."
Fionnula Flanagan (71)
"Eat your cabbage and get plenty of sleep . . . Of course, older mother characters tend to be more complex than the young mother with the four-year-old son, the 'mommy' falling in love.
"Thank god I haven't been cast as a 'mommy'. I've been cast as a mother. There's a big difference."
Jane Seymour (62)
"It's critical to try and do all that you can to remain independent, so that you can get out by yourself or get down on the floor and play with your grandchildren.
"I have osteoarthritis; it's genetic. It didn't come from my early days of exercise.
"I've been open about it because I think that a lot of people suffer from osteoarthritis and they can say, 'Well my gosh, Jane Fonda is doing that and she has osteoarthritis, so why can't I?'"
Pierce Brosnan (60)
"The forties are very cool and very pastoral. The fifties look like they're pastoral and then you get a bit more turbulence.
"I was scared when they started. It's good to be scared . . . You know, you go on. Try to be your own misguided, stumbling, tumbling, funny creative being. Go on and be forgotten. They eulogise you, and then they forget you."
Helen Mirren (68)
"I sleep. When I'm working really hard, I don't party. I don't go to the bar after work.
"I don't go out to restaurants. I just go to bed. If I'm on a film, I even try to catch some sleep in my trailer at lunchtime.
"I really try to sleep as much as possible. It's very important and, as you get older, it becomes more so."
Christie Brinkley (59)
"I throw it down and I'll do 30 push-ups before I get in the shower. Then I do another 20 before I dry my hair, and now I've done 50.
"After I dry my hair, I'll come back and I'll do more.
"I've been a vegetarian since I was about 12 years old," she said.
"When I became a vegetarian I got my mom and dad to become vegetarian, and my brother became a vegetarian."
Demi Moore (50)
"I think I sit today in a place of greater acceptance of my body, and that includes not just my weight but all of the things that come with your changing body as you age. I find peace when I don't see my body as my enemy, when I step back and have appreciation and look at all that my body has done for me.
Jane Fonda (75)
"We need to revise how we think of ageing. The old paradigm was: You're born, you peak at midlife, and then you decline into decrepitude.
"Looking at aging as ascending a staircase, you gain well-being, spirit, soul, wisdom, the ability to be truly intimate and a life with intention."
Candice Bergen (67)
"People can get crazier as they get older.
"I can just be weird whenever I want, and there's the freedom of not caring what people think."
Woody Allen (74)
"There's no advantage in getting older. I'm 74 now. You don't get smarter, you don't get wiser, you don't get more mellow, you don't get more kindly.
"Nothing good happens.
"Your back hurts more. You get more indigestion. Your eyesight isn't as good. You need a hearing aid. It's a bad business getting older, and I would advise you not to do it."
Al Pacino (73)
"If you've got the energy and you've got the vitality, I think that is ageless . . .
"Sometimes people have a tendency to act older than they are because there's a certain relief to that."
"Age doesn't mean anything to me, because I work out every day. I work out twice a day, as a matter of fact.
"So for me, to get on the set and to swing the sword around again and to ride the horses and all those things doesn't mean anything, because I feel like I did 30 years ago. So as long as I stay in shape, that's the key thing."