The Queen and Duke of Edinburgh joined Second World War veterans and others to mark the 70th anniversary of VJ Day and pay tributes to the thousands of Allied soldiers, sailors and airmen who sacrificed their lives in the conflict.
A series of events marked the day Japan surrendered and the war was brought to and end.
Prime Minister David Cameron joined the royal couple for a service at St Martin-in-the-Fields church in central London's Trafalgar Square.
Dr Sam Wells, vicar of St Martin-in-the-fields, led the service in tribute to those who lost their lives in defeating Japan to end the Second World War.
The church service featured various hymns and readings, including passages such as We Will Remember Them and The Kohima Epitaph, before ending with the national anthem.
A wreath was dedicated at the altar in memory of those who died in the fight against the Japanese and as a result of captivity in prison camps in the Far East.
Outside the church, security was tight around the church in Trafalgar Square.
Hundreds of veterans gathered on Horse Guards Parade for a Drumhead commemoration, which was attended by the Prince of Wales, the Duchess of Cornwall and Prime Minister Cameron.
Royal Marine buglers and percussionists from Portsmouth piled up their drums to form a ceremonial altar at the centre of the parade, replicating the practice used by troops on the front line.
Charles, Mr Cameron and Royal British Legion chairman John Giddings laid wreaths by the Drumhead, while Camilla watched from the royal box.
Crowds applauded as a Dakota, Hurricane and a current RAF Typhoon fighter in a fly-past, though only three of the expected five planes took part.
Actor Charles Dance read Rudyard Kipling's Mandalay, a favourite marching tune for many in the 14th Army in Burma, and a well known verse for the families of veterans and many school children.
Speaking at the ceremony, Mr Cameron said thousands of people had died and many others "suffered appalling injuries and torture" during the conflict to "preserve our freedoms".
The royals and the prime minister spent time speaking to veterans, listening to their experiences during the war.
And while security surrounding the ceremonies was tight, the Metropolitan Police encouraged people to attend the VJ Day events.