Monarchs such as Victoria and Elizabeth I are remembered as icons in a period of change. Their fashions were synonymous with the era of their reign. As a new and young monarch in post-war Britain, Queen Elizabeth II became the ruler of a country undergoing political, social and sartorial change and her style has been emblematic of the many changes and eras she has reigned through.

Never before had fashion been so prevalent and whilst of course no one expected her Royal Highness to step out in a pair of flares and Mary Quant mini in the Sixties, Elizabeth II has remained a stylish and sophisticated icon of British fashion throughout her life. She worked with fashion pioneers such as Norman Hartwell and Hardy Amies, as well as inspiring the likes of Dolce and Gabbana to model their autumn/winter 2008 collection around her.

Captured around the world and through the lens of everyone from Cecil Beaton to Annie Leibovitz, Elizabeth's style is individual to her and endlessly classic. Despite her utter dedication to professionalism and her role as monarch, the Queen has always managed to have a little fun with a wardrobe that has also managed to stay way clear of any form of seasonal disasters.

From the military feminist overalls of her Auxillary Territorial Service uniform in 1945 to her rather daring safari pant suit, there are but a few occasions that she has strayed from her trusted fashion formula. Bold colours and perfect day coats worn with simple black patent slip-ons by Anello & Davide of Kensington as well as playful, albeit priceless, accessories and a luxurious classic Launer handbag are the staples of the Royal wardrobe. Not many people can claim their their style has remained relevant for nine decades.

The Royal Palaces understand the importance of the Queen's style more than anyone as they open Buckingham Palace to the public and with it an exhibition of her majesty's most prized items of clothing including her Coronation and wedding gowns by Sir Norman Hartnell.

As the Queen celebrates her official 90th birthday, IBTimes UK looks back on her most fabulous fashion moments.

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1928: Princess Elizabeth, aged two, in a ruffled layered party dress and pearlsThe Print Collector/Print Collector/Getty Images
the Queen at 90
6th May 1937: The then Princess Elizabeth and sister, Princess Margaret, leaving Westminster Abbey in their matching outfits, after a rehearsal for the coronation of their father as King George VIGetty
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8 July 1941: Princess Elizabeth wears a broderie anglaise Peter Pan collar shirt and waistcoat whilst playing with sister Margaret and their pet chameleon in the grounds of Windsor CastleGetty Images
the Queen at 90
30th June 1942: Princesses Elizabeth and Margaret Rose dressed down in Girl Guide uniforms at Frogmore, Windsor, BerkshireLisa Sheridan/ Getty
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23 December 1944: Princess Elizabeth dressed up for a production of Old Mother Red Riding Boots at homeLisa Sheridan/Studio Lisa/Getty Images
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18 April 1945: Princess Elizabeth is almost unrecognisable in overalls as she changes the tyre of a vehicle whilst training as an ATS Officer during World War TwoCentral Press/Hulton Archive/Getty Images
the Queen at 90
8th July 1946: Princess Elizabeth, the future Queen Elizabeth II, chatting with her father, King George VI. Her tea dress embodies the simplicity of fashion in post-war England whilst still displaying her love of print and textureGetty
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July 1947: Princess Elizabeth poses in the state apartments at Buckingham Palace upon her engagement to Prince Philip in a simple shift dress with bow detailsHulton Archive/Getty Images
the Queen at 90
20 November 1947: Princess Elizabeth and Prince Philip pose at Buckingham Palace after their wedding ceremony which was held at Westminster Abbey. Like everyone else in the UK at the time, the Queen had to save her clothing rations in order to have her dress made by the designer Norman Hartnell, which was worn with silk Raine sandals (Topical Press Agency/Getty Image)
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Circa 1950: A Cecil Beaton portrait of Princess Elizabeth in the drawing room of Clarence House in a Norman Hartnell gown. Hartnell was appointed official dressmaker for the Queen at the timeBettmann Archive/Getty Images
the Queen at 90
17th October 1951: The Duke of Edinburgh dances with his wife, Princess Elizabeth, at a square dance held in their honour in Ottawa, by Governor General Viscount Alexander during their Canadian tourKeystone/Hulton Archive/Getty Images
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June 7, 1952: Riding side saddle and saluting during a Trooping of the Colour ceremony at Horse Guard's Parade, central London. The Queen has worn military uniform throughout her reign, always in the most sophisticated and elegant waySTRINGER/AFP/Getty Images
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2nd June 1953: HM Queen Elizabeth II with her maids of honour in the Green Drawing Room at Buckingham palace. Following the example of Queen Victoria, Elizabeth chose six Maids of Honour instead of pages to bear her velvet train throughout the Coronation ceremony. The gown was designed by Sir Norman HartnellGetty
the Queen at 90
February 1954: In a slim-fitted lace design, black tulle and feathrered hat that would perhaps be more expected from her sister Margaret, Queen Elizabeth II looked absolutely beautiful as she attended a garden party in Sydney, Australia, before leaving for Tasmania on the liner 'SS Gothic'Keystone/Hulton Archive/Getty Images
the Queen at 90
1956: Queen Elizabeth II looks relaxed in a cotton A-line summer dress with Prince Charles at Windsor Great Park, during a polo matchHulton Archive/Getty Images
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Circa 1960: The Queen plays with her daughter Anne. Not often seen in trousers, she looks very contemporary in a riding jacket and loose jodhpursGetty
the Queen at 90
1960: The Queen has often worn yellow to the races and look wonderful in a typical sixties style cocoon coat with oversized buttons at the Epsom Downs Racecourse for the Oaks Stakes in SurreyFox Photos/Hulton Archive/Getty Images
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Queen Elizabeth II looked effortlessly sophisticated in a royal blue tulle gown as she greeted President John F. Kennedy and First Lady Jackie Kennedy who were paying a visit to the royal family in EnglandGetty
the Queen at 90
November 1964: A fan of bold colours in evening and daywear, Elizabeth stood out in a coral silk gown as she attended a performance at the Royal Academy of Dramatic Art (RADA) in LondonGetty
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6th October 1967: Queen Elizabeth II walking cross country at the North of Scotland Gun Dog Association Open Stake Retreiver Trials in the grounds of Balmoral Castle. A silk headscarf and family tweed have long been the Queen's uniform when spending time at BalmoralGetty
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July 1970: The Queen braved the cold temperatures in style, wrapping up in a fur-trimmed jacket, as she visited Resolute Bay in Nunavut during a royal tour of CanadaGetty
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July 11th 1970: Princess Anne and the Queen covered up uncharacteristically in Pantsuits for protection from the blackflies during a walk through Fort Providence; Northwest Territories in CanadaDoug Griffin/Toronto Star via Getty Images
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14 October 1975: The Queen, a keen photographer, kneels down and watches the Badminton Horse Trials in a perfect mix of colourful tweed, block-colour pink turtleneck and classic BarbourAnwar Hussein/Getty Images
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February-March 1975: Queen Elizabeth II looks radiant in a vibrant yellow polka dot dress and turban as she meets a group of local children during her state visit to Mexico. White gloves and matching bag along with a diamond brooch and pearls have long stayed with her as everyday staplesGetty
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1974: The Queen arrives at Aberdeen airport with her corgis to start her holidays in Balmoral. Her handbag by British brand Launer and handmade shoes by Anello and Davide of Kensington have remained a constant for over 50 years, whilst more contemporary additions such as the feather headpiece are typically 1970sAnwar Hussein/Getty Images
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February 1977: Queen Elizabeth II in Fiji during her royal tour in a drop-waist summer dress and tulle detailed hat with Launer handbag and matching white glovesGetty
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May 1979: The Queen, wearing a dramatic but fitting pink cape and matching headscarf, whilst attending the Royal Windsor Horse ShowTim Graham/Getty Images
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1979: Queen Elizabeth II in one of her most contemporary looks in a paisley print shirt and aviator sunglasses as she goes on safari with Prince Philip during their state visit to ZambiaSerge Lemoine/Getty
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15 February 1979: Queen Elizabeth II Exchanging Gifts With The Amir Of Bahrain, his Highness Shaikh Isa Bin Sulman Al Khalifa At Qudaibiya Palace in Bahrain. The coral-hued lurex detailed gown is subtle and refined but still very seventies, although toned down with white glovesTim Graham/Getty Images
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October 1982: The Queen and Prince Philip visit the Solomon Islands during a tour of the South Pacific. Queen Elizabeth wears a sky blue skirt-suit with floral detailed hat paired with her signature Launer bag and a pair of Anello & Davide white leather slip-onsAnwar Hussein/Getty Images
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October 14, 1989: Showing how Kate has followed in her footsteps, the Queen often mixed british designs with more traditional attire as she did when visiting the Shah Alam mosque in South East Asia. Touring the mosque with the architect Baharuddin Abu Kassim, the monarch wore a shimmering blue and gold silk robe with matching slippersTORU YAMANAKA/AFP/Getty Images
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4 August 1990: A floral fantasy for the Queen Mother's 90th birthday. The Queen, Princess Diana and Princess Margaret all dressed in vibrant, playful designs for the celebrationsGetty
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2 April 2002: The Queen was dressed more somberly in headscarf and equestrian jodhpurs and rain jacket as she rode her horse in the grounds of Windsor Castle, three days after the death of her motherDan Chung
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October 21, 2008: Queen Ellizabeth II paired her trusted Launer bag and Anello & Davide shoes with a bold blue coat with graphic fur trim and matching hat as she arrived with Prince Philip at Joze Pucnik airport on the first day of a two-day tour of SloveniaGetty
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July 5, 2012: Looking as sophisticated as ever in full regalia for the Thistle Ceremony in Edinburgh, Queen Elizabeth II smiles as she leaves St Giles CathedralGetty
the Queen at 90
July 11, 2013: Queen Elizabeth II enters The Mirrored House during the Coronation Festival in the garden of Buckingham Palace. In one of her most relaxed outfits, the floral shift dress and horsebit loafers are a perfect garden party pairing for any ageGetty
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17 July 2014: The Queen stands out in one of her iconic suits as she meets construction workers as she at the official opening of the refurbished Reading StationBen Gurr/Reuters
State Opening of Parliament
18 May 2016: Queen Elizabeth II, accompanied by Prince Philip, in full regalia as she reads the Queen's Speech at the State Opening of ParliamentAlastair Grant/ Reuters
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10 June 2016: Queen Elizabeth II looks happy and glowing as she attends a National Service of Thanksgiving on her official birthdayStuart C Wilson/Getty Images

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