Prince George turns two on Wednesday

London: Britain's Prince George will mark his second birthday tomorrow with a low-key party planned by mum Kate Middleton.

Unlike his first birthday at Kensington Palace in London, this year he will celebrate in a countryside setting at the new family home of Anmer Hall on his great-grandmother Queen Elizabeth II's Sandringham estate in the east of England.

The Kensington Palace official twitter account told its 550,000 followers today, "We'll be sharing a special photo of Prince George later ahead of his birthday tomorrow. Watch this space! #HappyBirthdayPrinceGeorge".

His grandparents Michael and Carole Middleton and aunt Pippa will join other close friends of his dad Prince William, the Duke of Cambridge, and Kate.

But George's other set of grandparents - Prince Charles and the Duchess of Cornwall - will not be attending as they are on an official visit to the West Country, south-west England.

Prince William has also just started his new job as an East Anglian Air Ambulance helicopter pilot and may not be able to make the party due to work commitments.

The Middletons run a very successful family business selling party supplies, and the Duchess of Cambridge's sister Pippa has even written a book about how to plan a party.

With all this help from family and from a nanny and housekeeper, Kate has been determined to organise the party herself, the 'Daily Telegraph' reported.

The Queen, who dropped in for 50 minutes during his first birthday celebrations last year, is unlikely to attend this year.