London ( CNN ) -- Prince Harry has become the latest member of the British royal family to join Twitter . The prince sent a message from London 's BT Tower Thursday to mark tickets going on sale for the Invictus Games , which he champions . The international competition , which was launched by Harry in March this year , organizes special sporting events for wounded , injured and sick servicemen and women . Tweeting from the Invictus Games account , the prince said : `` Hope everyone will get behind # invictusgames . Great opportunity to support and thank the men and women who have given so much . Harry . '' Harry then joined a Twitter Q & A with Daniel Whittingham and Andy Phillips , who hope to take part in the competition as part of the British Armed Forces Team . Whittingham said `` During rehab , sport plays a key part in every soldier 's recovery . Put them in a wheelchair , on a sitting volleyball court or in a pool and you will see a fire rekindled in their eyes . I 'm really excited about potentially being a part of the Invictus Games and prove I am unconquered by my injury . '' Although he is yet to create his own account , Harry joins a number of royals with a presence on Twitter , including Prince Andrew ( @ TheDukeofYork ) , the Queen ( represented by @ BritishMonarchy ) , and Prince Charles , who tweets from the handle @ ClarenceHouse . The Invictus Games will take place in September this year , in Queen Elizabeth Olympic Park , London , which was built for the 2012 Summer Olympics . Tickets go on sale at 9am GMT on Friday 16 May and the full schedule can be found on the Invictus Games website .
Prince Harry sent his first tweet from the top of the British Telecom tower in London . His tweet marked tickets going on sale for the Invictus Games . The competition organizes games for wounded , injured and sick servicemen and women .