Both the Prime Minister and the Chinese premier travelled north from London on Friday to explore the "northern powerhouse" of Manchester.
Whilst there they attended a training session at the Etihad Stadium and stood for a quick snap with the club's flagship Argentinian striker.
Cameron appears at the very edge of the photograph while Mr Xi stands tall next to Agüero. The photo has since gone viral, amassing hundreds of re-tweets online.
But the visit - and the picture - belies Mr Xi's true colours - as he's a Red Devil through and through.
The renowned Manchester United fan was apparently lobbied to attend Old Trafford rather than the Etihad, but Xi preferred to visit the area of regeneration around City's stadium.
Political selfies have become something of a thing, with Cameron having history of taking the snaps on occasion, as these pictures prove beyond doubt: