King Charles' antipodean admirers got a first glimpse of their reigning monarch Sunday, as the British royal attended a church service and expressed his "great joy" at returning Down Under. The 75-year-old sovereign arrived in Sydney late on Friday evening, but had kept a low profile as he balances cancer recovery with royal duties. His first official public appearance was a Sunday morning service at St Thomas' Anglican Church, a stone edifice built as a place of worship for British colonial settlers.

A few hundred people gathered around the building, cheering, holding flowers and waving flags. Two women held up a sign saying "G'day your majesties". Lynton Martin, 22, drove nine hours from Melbourne and donned a union flag print jacket and nine royal lapel pins before trying to catch a glimpse of the royals.

"I wanted to show that we are supportive and welcoming of the king," he told AFP, expecting an "aura" to Sunday's service. Last year Martin travelled to London for Charles' coronation, which he described as a "spectacular" event. During the church service Bishop Christopher Edwards prayed for peace and an end to wars, and asked that Charles' upcoming Commonwealth summit in Samoa be prosperous.

Later Sunday, Charles made a brief remarks at the New South Wales legislative council, where he hailed the "promise and power of representative democracy" and cracked a joke about his advancing age. "I first came to Australia nearly 60 years ago, which is slightly worrying" he said .