TICKETS for the Olympic cross-country events in Greenwich Park have sold out, organisers say.

More than 20m ticket requests by 1.8m people were received for the London 2012 Olympics, with other sold out events including the modern pentathlon, which also sees its show-jumping stage played out in the royal park.

The opening and closing ceremonies are also sell-outs and will have a ballot to decide ticket allocations as will most of the sessions in swimming and tennis, and the high-profile athletics sessions.

London 2012 chairman Sebastian Coe said: "We are thrilled with the response right across the board, in all sports and all sessions."

He added: "Certain events have seen massive demand - for example the opening ceremony, which is more than 10 times oversubscribed, so there will understandably be disappointment and we will find a way to go back to those people with other tickets.

"What is most encouraging is that the majority of applications are for multiple tickets and for several sports, which shows that friends and family are planning to go to the Games together."

More than half of the 650 sessions are oversubscribed and tickets for these will be allocated via ballots. Some 6.6m tickets have been on sale to the public from March 15 until the window closed at 1am on Wednesday morning.

London 2012 say they will now check applications before running computerised ballots for those sessions which are oversubscribed.

Money will be taken from people's accounts from May 10 but they will not receive formal confirmation of which events they have been successful in buying tickets for until June.

There will be another chance to buy remaining tickets in June and July.

London 2012 added that more than 95 per cent of the applications came from the UK.

Test events for Greenwich Park's Olympic events will take place this July.