Robbie Williams has teased fans with the prospect of another reunion with Take That pal Gary Barlow after posting a picture online of the two of them rehearsing.
The duo are seen singing on a podium together surrounded by musicians in the image which was posted on Twitter on Friday, sparking speculation they will perform in the next few days.
The photo is accompanied by the caption: "Robbie and the Captain - what are they up to?"
Williams was reunited with his erstwhile bandmate earlier this month when they teamed up as Barlow was celebrated with a Music Industry Trusts Award at a gala dinner.
Both performers are due to play solo shows in the coming days. Williams is on the bill for the Royal Variety Performance on Monday and will play headline shows at London's O2 Arena from Thursday.
X Factor judge Barlow is to perform a Little Noise Sessions show for Mencap on Monday at east London's St John-at-Hackney Church, and is also playing a series of shows throughout this month and through to January as part of his first solo tour for 13 years.