The sports hero was caught running around a woodland area half-naked by celebrity-hunting fans on a tour of Los Angeles as he shot his latest campaign for his H&M underwear range.
But at least the advert, which is set to air next year (13), will have a macho edge - Ritchie is behind the camera.
A source tells Britain's The Sun, "Those pictures of a tour bus copping (getting) an eyeful of David in green pants is all for the ad.
"It's like a short action movie shot in typical Guy Ritchie style."
The Sherlock Holmes filmmaker has previously helmed adverts for French fashion house Chanel and sports giant Nike.
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