Tony Blair has led well-wishers at the marriage of former adviser Anji Hunter, whom he has known since childhood.
The couple were married in a civil ceremony
Ms Hunter, government relations director from 1997 to 2001, married Sky News political editor Adam Boulton at St James' Church, Piccadilly, London.
Other guests included names from the political, broadcasting and showbiz worlds for a service of blessing.
The prime minister arrived on foot a quarter of an hour before the ceremony, without his wife Cherie.
Politicians turn out
Mr Boulton, 47, and Ms Hunter, 51, came in a chauffeur-driven silver Mercedes, after a civil marriage ceremony at nearby Spencer House.
Others joining Mr Blair in the church were cabinet ministers Tessa Jowell, Lord Falconer, Baroness Amos and Peter Hain.
Also in attendance were former ministers David Blunkett and Charles Clarke as well as European Commissioner Peter Mandelson, Liberal Democrat leader Sir Menzies Campbell and former Lord Chancellor Lord Irvine.
Former Labour spin-doctor Alastair Campbell also put in an appearance, as did a number of journalists from newspapers and television.
Simply Red frontman Mick Hucknall was another prominent name among those in the church.