Although the Queen will have a dinner with family for her birthday on 21st April, there will be events held across the country this summer allowing supporters to be included.
The Queen's Birthday Parade will take place in June at St Paul's Cathedral, and Her Majesty will be joined by Duke of Edinburgh, Duke and Duchess of Cambridge, Prince Harry and an expected 10,000 spectators for the Patron's Lunch.
During the weekend of celebrations, which will end with the Patron's Lunch, communities all over the UK will be encouraged to throw street parties in the Queen's honour.
She has held the throne for more than 64 years, but Elizabeth was never supposed to become Queen. It was only when her uncle Edward VIII was abdicated in 1936 in order to marry American divorcee Wallis Simpson that Elizabeth's fate changed.
Despite this, Her Majesty has always been dedicated to commonwealth. Speaking during her 21st birthday celebrations, she said: " i declare before you all that my whole life, whether it be long or short, shall devoted to your service and the of our great imperial family which we belong."
On the morning of her 90th birthday, the Queen will visit Windsor town centre. During her visit, crowds of people are expected to gather to pass on their well-wishes and since happy birthday.
And it's something the Queen is expecting! Addressing her milestone during her Christmas speech last year, she said: "I am looking forward to a busy 2016, though I may have been warned I may have happy birthday sung to me more than once or twice."