Hillary Clinton is laughing in the face of the accepted retirement age - currently 65 both in the UK and the US - by aiming to become the leader of the Free World just months before her 70th birthday. If the former U.S. Secretary of State reaches her goal and is sworn in as the 44th President of the United States in January 2017, then she will not only be the country's first female president but also the second oldest, behind Ronald Reagan, ever to open the doors to the White House. Clinton certainly seems to be relishing the life experience that her advancing years have given her. Age is nothing but a number: Hillary Clinton who has launched her campaign to be US president (pictured above, speaking at the Women in the World Conference on April 23) will be 69 when she takes office if successful . Celebrating her advancing years: A black-and-white photograph showing Hillary as a toddler just after the end of the Second World War has been posted on her Twitter feed . A black-and-white image posted on her Twitter account this weekend showed  a very young Clinton pointing at the camera, accompanied by the phrase 'Hillary's counting on you', echoing Lord Kitchener's famous First World War slogan: 'Your country needs you'. It appears the presidential candidate is very much celebrating her age: the image itself would have been shot while Clinton was a toddler just after the end of the Second World War. Elsewhere, Clinton's newfound Grandmother status - her daughter Chelsea gave birth to a daughter, Charlotte, with husband Marc Mezvinsky in September last year - has seen her able to relate to a whole new section of the voting public. Doting...but could Hillary's recent status as a grandmother be a powerful tool in her bid to win votes? Last week, the politician, currently 67, posted the hashtag #GrandmothersKnowBest to her Twitter feed . The hashtag #GrandmothersKnowBest used on Hillary's Twitter page has attracted other grandmothers to post their own posts using it . In a recent Twitter posting promoting vaccines for children, Clinton ended the appeal with the hashtag #GrandmothersKnowBest, which has since seen a stream of grannies from across the globe tweeting their own posts using the hashtag. Clinton is by no means the only high-profile woman refusing to change gear as she gets older; there are a raft of successful female figures continuing to put their foot on the gas and  power their way into the last quarter of their lives. Below, we've outlined some of the world's most influential women whose careers - in everything from fashion to politics - are still flying high after retirement age. ANNA WINTOUR . AGE: 65 . The biggest name in the fashion industry, Anna Wintour has managed to fly high well into her seventh decade despite working in what is regularly deemed the most superficial of industries. Although her Vogue U.S. Editorship has looked a little wobbly over the decades, as the names of new, younger faces have been mooted as possible replacements, Wintour is still very much at the top of the fashion tree. The most powerful woman in fashion: Vogue US Editor Anna Wintour, pictured here between David Beckham (left with daughter Harper) and James Corden (right) in LA on April 16 remains ever influential . Said to be the muse for hit film The Devil Wears Prada, mother-of-two Wintour can be assured of a front row seat at whichever catwalk show she chooses. Celebrity fans include the Beckhams, Roger Federer (the feeling is very much mutual) and Kate Moss. Two years ago, she was named artistic director for the entire Condé Nast publishing empire. DAME JUDI DENCH . AGE: 80 . Long established as a national treasure, Dame Judi Dench will turn 81 in December this year. With a gilded career that stretches six decades behind her, Dench has been vocal about her dislike of the ageing process, saying to U.S. magazine People: 'There’s nothing good about being my age.' She continued: 'Someone said to me, "You have such a wealth of knowledge," and I just said "I’d rather be young and know nothing, actually." Bugger the wealth of knowledge.' Despite failing sight which has left her unable to travel alone, the actress is showing no signs of retiring; her latest film The Second Best Exotic Marigold Hotel has just been released in America. Life begins at 80? Famous octogenarians Judi Dench (left) and baking star Mary Berry (right) have both seen their careers prosper in the twilight of their lives . MARY BERRY . AGE: 80 . Perhaps the key to the longevity of one of the country's most famous bakers is her energy. Slim, sharp and sprightly, Mary Berry has seen her career flourish through the generations with the BBC's Great British Bake Off programme taking her profile to new levels. Born in 1935, Berry has seen every food trend come and go but continues to stay current; with a knack for gently advising younger contestants on the show how best to improve their cakes without leaving them too dejected. Her colourful wardrobe has been copied by women much younger than her 80 years and 181,000 people adore her on Facebook. With spin-off shows planned including Junior Bake Off and regular television and radio appearances, plus a new book, Berry is busier than ever. DIANE VON FURSTENBERG . AGE: 68 . The Belgian-born designer behind the iconic wrap dress currently has 85 shops worldwide and has held the position of president of the Council of Fashion Designers of America (CFDA) since 2006. A supporter of Hillary Clinton's 2016 campaign, Von Furstenberg has spoken about her own views on women in the workplace, saying: 'I never really felt the glass ceiling in fashion; I always felt my being a woman as a strength and as a gift.' The mother and grandmother continues to hold the United Nations DVF awards, which celebrates the achievements of women and said in her 2014 memoir, The Woman I Wanted to be: 'I cannot pretend that I am younger than I am, and truly I feel that I have lived so fully that I should be twice my age.' Fashion designer Diane Von Furstenberg, 68 (left),  has been open about her age, saying 'I feel that I have lived so fully that I should be twice my age' while Miuccia Prada, 65, who owns the famous Italian Prada label, has spoken of her desire to get into politics... MIUCCIA PRADA . AGE: 65 . When you run a global fashion empire, you needn't worry about collecting your pension but Miuccia Prada's career  continues to accelerate. Named the world's 75th most powerful woman in 2014 by Forbes, Prada the brand is worth an estimated $11.1 billion and Miuccia remains one of the highest-paid women in the industry. Joining the family leather handbag business in 1978, she quickly took control and oversaw the brand as it became a global fashion player in the late eighties. She has described the fast-paced fashion industry as like working 'on waves which break really quickly.' Although the Italian designer hasn't been officially involved in politics, it is a passion that she could yet develop. She said in 2011: 'Politics have always been a little of my passion. And now I [could] use my work as a tool to do things other than fashion.' AUNG SAN SUU KYI . AGE: 69 . Nobel peace prize winner Aung San Suu Kyi became famous the world over for her 21-year incarceration in Burma. When her house arrest ended in November 2010, she went on to stand for parliament in the country, winning a landslide victory. Inspiring: Hillary and former Burmese political prisoner Aung San Suu Kyi, 69, have both been prolific in their respective political arenas and show no signs of slowing as they approach their eighth decade . In June 2013, the former political prisoner announced that her political desires still burned strongly and that she wanted to run for the Myanmar presidency in 2015. Without the approval of at least one military legislator, it is, however, likely to remain just an ambition. MARGARET CHAN . AGE: 67 . By the time Dr Margaret Chan steps down from her role as Director General of the World Health Organisation in 2017, she will have served ten years in one of the most influential positions in health. Originally from China, Dr Chan was appointed Director of Health of Hong Kong before being elevated to the top position for the WHO in 2006. Dr Chan has had to manage responses to global panics such as SARS, bird flu and Ebola. Forbes lists her as the 30th most powerful woman in the world. Leading the way in the world of health: In the UK Professor Dame Sally Davies, 65, (left) is the Chief Medical Officer while (right) Margaret Chan, 67, has been in charge of the World Health Organisation since 2006 . SALLY DAVIES . AGE: 65 . Birmingham-born Professor Dame Sally Davies is the UK's Chief Medical Officer and can be seen advising the government on everything from three-parent families to the ebola crisis and obesity. A haematologist by trade, she was charged with developing the National Institute for Health Research in 2006, with a £1billion budget. The secret to keeping on top of such a stressful job? Not reaching for the bottle. Dame Sally told the Times in 2014: 'Even if it’s 7 or 8pm, I don’t go for the glass of alcohol, I go for a cup of tea and that solves my need for something to drink to unwind.' NANCY PELOSI . AGE: 75 . Currently the highest ranking female politician in U.S. history, Democrat Nancy Pelosi served as the 60th Speaker of the United States House of Representatives from 2007 to 2011. Nancy Pelosi, 75, remains the highest ranking female politician in American history . The Italian-American has just turned 75 and is the current minority leader of the House of Representatives. Her Twitter profile, for which she has nearly 600,000 followers, describes her as: 'Democratic Leader, focused on strengthening America's middle class and creating jobs; mother, grandmother, dark chocolate connoisseur.' Pelosi posts daily on the social media site. DILMA ROUSSEFF . AGE: 67 . The 36th president of Brazil, Dilma  Rousseff, knows very much how Hillary Clinton might be feeling at the start of her election campaign. Rousseff is the South American country's first female president. Political big hitter Dilma Rousseff, 67, became the first female president of Brazil in 2010 . Now in her second term, Rousseff was originally elected in 2010 and re-elected in 2014, narrowly beating her nearest rival Aécio Neves. The daughter of a Bulgarian immigrant may have broken the glass ceiling that Clinton has famously referred to but her popularity isn't assured; a corruption scandal at Petrobras, the state-run oil company, has seen activist groups calling for her to be impeached.
If her campaign succeeds, Clinton will be the second oldest U.S. President . Has so far used her age to win voters posting photographs of herself as a child after WWII and also using the hashtag #GrandmothersKnowBest . Clinton leads a global group of high-achieving older women including Anna Wintour, Judi Dench, Dilma Rousseff and Nancy Pelosi .