Fans had assumed their Live 8 collaboration was their last hurrah, but Pink Floyd's David Gilmour and Roger Waters have put their differences aside to perform on stage for charity once more.
The musicians, who fell out in the early 1980s, performed at a fundraising event hosted by Jemima Khan to help Palestinian children.
The pair performed a trio of Floyd tracks as well as the Phil Spector song To Know Him Is To Love Him.
Gilmour and Waters last shared a stage when Pink Floyd briefly reunited for a one-off performance at Live 8 in Hyde Park five years ago.
But they ruled out further shows despite lucrative offers to tour in the US.
Waters is to revisit the band's The Wall album for a North American tour from September with shows in the UK next year.
Speaking after the announcement of the tour, Waters said that his former bandmate was "completely uninterested" in touring again as Floyd.
The performance by the bass player and guitarist was for the Hoping Foundation (Hope and Optimism for Palestinians in the Next Generation), organised by Bella Freud.
They played to around 200 guests and played songs for charity pledges. Their Floyd songs were Wish You Were Here, Comfortably Numb and chart-topping single Another Brick In The Wall (Part Two).
Also performing on the bill were Nick Cave - who was joined on tambourine by Kate Moss - and Tom Jones.
Gilmour's blog explained that the Spector song "regularly featured in Pink Floyd sound checks many years ago".
More than £350,000 was raised for the charity at the event at Kiddington Hall in Oxfordshire on Saturday.Reuse content