The Queen shines in lime green as she celebrates her 90th birthday

The Queen was met with rapturous cheers on her 90th birthday as she exited Windsor Castle, greeted by thousands of fans lining the town's streets to see the monarch on her special day. They then broke into a rendition of "Happy Birthday" especially for their royal visitor.

The Coldstream Guards band played the national anthem as Her Majesty exited the Advance gate of Windsor castle in her burgundy Bentley with the Duke of Edinburgh by her side. Wearing a spring grass green coat and matching hat by Angela Kelly, the Queen exited the car at the King Henry VIII gate where she briefly spoke to the Mayor of Windsor before carrying out a walkabout of the town.

TAP TO VIEW GALLERYThe Queen recieving flowers from fans The Queen greeted well-wishers on a walkabout of Windsor

Her Majesty was presented with countless bouquets of flowers, while crowds waved their Union Jack flags and continued to sing happy birthday. She took the time to meet the fans who had gathered in honour of her special day – including superfan Terry Hutt, who had camped out in a bid to get a glimpse of the Monarch.

GALLERY: THE OFFICIAL PORTRAITS MARKING THE QUEEN'S 90TH BIRTHDAY

After her 100 yard walkabout down Castle Hill, Her Majesty officially opened The Queen's Walkway - a 6.3km walking trail which connects 63 points of significance in the town of Windsor. It was designed by The Outdoor Trust to symbolically recognise the moment that The Queen became Britain's longest reigning monarch after more than 63 years on the throne.

The Queen all smiles walking by as she greets her fans Thousands of fans lined the streets of the town

The royal couple then continued their walk along the High Street to Guildhall, where they met Military Wives choir along with fellow nonagenarians from the surrounding area. Great British Bake Off winner Nadiya Hussain was on hand to present the Queen with her birthday cake – an orange drizzle cake with orange curd and buttercream.

Following the brief presentation the Queen delighted crowds by getting into an "open state review" open Land Rover for a drive through the streets of Windsor.

Queen with Prince Philip riding the back of a truck through a crowd of people The royal couple drove through the streets of Windsor in an open topped Land Rover

It is not all Her Majesty has planned for her special day. In the evening Her Majesty will be accompanied by Prince Philip, Prince Charles and the Duchess of Cornwall at a beacon lighting ceremony to celebrate her milestone birthday.

THE QUEEN'S 90TH BIRTHDAY: 90 REASONS TO SALUTE HER MAJESTY

Her Majesty will light the principal beacon, and a further 1,000 beacons will be lit across the country and worldwide in honour of the Queen's 90th birthday. Members of the Army Cadet Force will even take beacons to the top of the four highest peaks in the United Kingdom – Ben Nevis, Scotland; Mount Snowdon, Wales; Scafell Pike, England, and Slieve Donard, Northern Ireland.

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