Celebrated music producer Bob Clearmountain is being flown in to put his magic touch on The Rolling Stones' return to London's Hyde Park tomorrow.
The band will give a headline performance at the outdoor venue for the first time since their historic free concert almost 44 years ago.
And Grammy-nominated Clearmountain - renowned for his work as a live mix engineer - has been lined up to ensure recordings of the show are up to scratch.
The Stones will play two shows at Hyde Park, with the second next Saturday, and both will be filmed and recorded. It is thought the sound recordings will go on to be sold through the iTunes Store, while footage is expected to form a future DVD release.
Although Clearmountain is not working on the sound which concertgoers will hear, he will be making the sure the sound of the recordings is the best it can be. He has previously worked on live albums Stripped, Still Life and Live Licks for the band, and also worked on their studio albums Tattoo You, including the single "Miss You".
The band's performance at Hyde Park comes just days after their much anticipated show as headliners at Glastonbury last weekend which saw them run through many of their best known hits.
Frontman Sir Mick Jagger has already hinted that the concert will feature many of the songs from the band's set list when they played their free show in 1969.
In an interview with Absolute Radio's Pete Mitchell, he said: "Obviously, the same set list is going to be used, it saves me having to think."
The previous gig, on July 5 1969, came just two days after the death of founder member Brian Jones and marked the live debut of his replacement guitarist, Mick Taylor. The performance kicked off with Sir Mick reading extracts from a poem by Shelley in tribute to Jones, who was found dead in his swimming pool at home.
There has been speculation that the band would be welcoming some guest performers to the stage, but it now seems more likely that the band themselves will be the main focus although former guitarist Mick Taylor will join them as he did at Glastonbury. Support act Gary Clark Jr, the blues guitarist, may also put in an appearance with the Stones.
As ever, there will be a few starry VIP guests at the show, which forms part of the new Barclaycard Presents British Summer Time festival, who are expected to include Kate Moss among others.