Britains Prince William and Kate Middleton have posted out invites to their highly anticipated royal wedding to around 1,900 guests,officials said Sunday. St Jamess Palace said military personnel and charity workers will mingle with European royalty,diplomats and the family and friends of the couple at the Westminster Abbey ceremony on April 29. Around 600 people will later attend a lunch reception at Buckingham Palace hosted by the queen,while just 300 are invited to a formal wedding dinner and dance at the palace.