On Thursday Queen Elizabeth II will be the oldest-ever monarch of Britain, surpassing her great-great grandmother Queen Victoria.

A royal spokeswoman said that this will be an ordinary day for the queen and nothing special was prepared to mark the event.

She said: "There's nothing the queen is doing to mark the occasion," AFP informs.

Queen Victoria was born on May 24, 1819 and lived for 81 years, seven months and 29 days. She died in 1901.

Elizabeth was born on April 21, 1926 and is the 40^th monarch of Britain since William the Conqueror took the throne in 1066. At 5:00 pm (1700 GMT) today she will be the oldest living monarch, surpassing Victoria.

Elizabeth is the world's second-longest serving monarch alive. The first one is Thai King Bhumibol Adulyadej. She had 11 prime ministers during her reign, the first one being Sir Winston Churchill.

Still, she will have to wait until September 9, 2015 to surpass Victoria as the longest-serving monarch ever. Victoria ruled the empire for 64 years.

Even though she is 81 years old, the Queen doesn’t show any signs of backing down.

Last month she attended the Commonwealth summit in Uganda with her husband Prince Philip and son, Prince Charles.

Peter Hennessy, professor of contemporary British history at Queen Mary's college, University of London, said: "Even allowing for the improvement in medicine since Victoria, it is remarkable," referring to the fact that she accomplished 425 official engagements in 2006.