Speaker of the House of Commons the Rt Hon John Bercow MP and Sally Bercow
Prime Minister of Australia, Julia Gillard
Deputy Prime Minister Nick Clegg and Miriam Gonzalez
Prime Minister David Cameron and Samantha Cameron
Leader of the Opposition Ed Miliband and partner Justine Thornton
Elton John and David Furnish
Queen Sofia, Prince Felipe and Princess Letizia of Spain
Politico reports on some of this year's attendees, which include Tory Burch, Rahm Emanual, Chris Colfer and Jane Lynch. We're looking forward to who else is attending!