Why won't they retire? 7 older celebrities who are doing their best work ever

Many people slow down after 65 but these super seniors are refusing to act their age. From storming the stage to saving the world, here are seven celebrities proving the grass is greener over the hill.

Fauja Singh, 105

The ‘Turbaned Tornado’ only took up long distance running in his 80s, but was quickly signed by Adidas for their ‘Nothing is Impossible’ campaign. Singh participated in the Mumbai marathon this year, and is a world record-holder [5 hours, 42 minutes at age 93] for the marathon in his age bracket. He also champions healthy living, advising people to listen to their body and what it's telling them. Singh is a vegetarian, who eats very little, but that doesn't mean he's opposed to a McDonald's milkshake on cheat days...

Ban Ki-Moon, 72, previous UN Secretary-General

Growing up in Korea and seeing how the UN helped his homeland, Ki-Moon decided to devote himself to public service. As Secretary-General, a role he assumed at age 62, he has presided over the UN during intensely difficult global crises. His many achievements include organising climate change summits, providing aid to developing countries, peacekeeping, and creating a UN agency to empower women. In July 2016 alone, Ki-Moon visited Kashmir to denounce the violence, and Algeria to highlight the plight of Saharan refugees. Ki-Moon has called upon world leaders to honour a truce during the Rio Olympics, and found time to Skype the pilot of the Solar Impulse 2, a plane using only solar power. "It's a historic day for humanity," Ki-Moon said of the pilot's flight around the world.

Angela Lansbury, 90

This living legend got her break way back in 1944, as Ingrid Bergman's cockney maid in the thriller Gaslight, which saw her earn an Oscar nod, and a contract at MGM. She went on to play opposite other luminaries such as Hedy Lamarr and Elizabeth Taylor, as everything from a bad mother in The Manchurian Candidate (1962) to a lovable teapot in Beauty and the Beast, for which she sung the title song. Lansbury also scored big on the stage, and on TV, in the long-running hit, Murder, She Wrote. After 54 years of marriage, her husband Peter Shaw passed away in 2003, and the 77-year-old star managed her grief by throwing herself into work. She has been busier than ever on Broadway, and in 2014 toured Australia in Driving Miss Daisy, opposite James Earl Jones. In 2016, as Lansbury was out enjoying a night of theatre in Los Angeles, she received a three-minute standing ovation – just for being in the audience.

Olivia Newton, John, 67

It's hard to believe Grease's goodie two-shoes is all grown up, but senior Sandy looks fantastic with a figure that can still squeeze into skin-tight spandex. The former country singer has sold over 100 million records, survived cancer, and performed her 1980s’ hit Physical on the TV show Glee! Newton-John recently joined younger divas Celine Dion, Britney Spears and Jennifer Lopez with a residency on the Las Vegas strip. Her Summer Nights residency at the Flamingo Hotel and Casino was recently extended – and sees the Aussie performer take audiences on a musical journey through her hits. Liv is also hopelessly devoted to an important cause, and a portion of all proceeds benefit her Cancer and Wellness Centre back home in Melbourne.

Mick Jagger, 74

This Rolling Stone definitely gathers no moss. The indefatigable frontman is expecting his eighth child with a 29-year old girlfriend. The iconic front man is living proof that ageing does not have to be a downward spiral and toured the world with the Stones for their 50th anniversary in 2012. He’s currently working on a new album, and in March 2016, the band made history, playing -for free - to an audience of 1.2 million at their first-ever gig in Cuba.

Jane Goodall, 82

Goodall's name is synonymous with primatology. She first travelled to Tanzania at age 26, befriended the species, and upended everything previously known about chimpanzees, apes and gorillas and their various cousins. She showed primates are capable of social and family life, have unique personalities, thoughts, and also experience emotions. Goodall has earned dozens of honorary doctorates and, in 2011, became a patron of Australian animal protection group, Voiceless. Today, her eponymous institute works to protect chimps and other endangered species, advocate for conservation, and inspire the next generation to care about our environment. To this end, the irrepressible eco-warrior travels nearly 300 days each year.

Judi Dench, 81

The classically trained Dame is one of Britain's most acclaimed actors, once winning an Oscar for a six-minute performance as Queen Elizabeth 1 in Shakespeare in Love (1998). Thumbing her nose at Hollywood's infamous slighting of older women, all her seven Oscar nods were for roles she played over the age of 60.  Dench also broke ground as the first woman to play the formidable spy agency boss, M, in the James Bond franchise. Although slowly losing her sight to macular degeneration, Dench has zero plans to retire. "It's the rudest word in my dictionary: 'retire," she says. "And 'old' is another one. I don't allow that in my house. And being called ‘vintage'. I don't want any of those old words. I prefer 'enthusiastic'." As if to drive home the point, she got her first tattoo this year, inking her right wrist with her motto: "Carpe Diem"

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Next: Ross Clarke-Jones redefines retirement

At 52, legendary Australian big wave surfer Ross Clarke-Jones has no intention of slowing down.

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