An eye-raising, never-before-seen photo of ex-prince Andrew lounging barefoot in a bathrobe with Jeffrey Epstein and British diplomat Peter Mandelson emerged Friday in files released by the US Department of Justice.

The disgraced former royal, who is now reduced to using his commoner name, Andrew Mountbatten-Windsor, is seen relaxing at an outdoor table with Mandelson, who also sports a robe and no shoes — as Epstein sits next to them fully clothed.

Three American flag mugs and two water glasses sit on the wooden table, and the trio is gathered around.

There’s no date or context for the photo but it’s believed to have been taken on Martha’s Vineyard between 1999 and 2001, before the late pedophile was convicted of soliciting a minor for prostitution in 2008.

A similar photo appeared of Mandelson, a former Labour Party politician, in Epstein’s notorious 2003 “birthday book,” which reveals the fallen financier’s sexually charged relationships with powerful friends.

Both the ex-prince and Mandelson have faced criticism over their close friendships with Epstein after his conviction — with Mandelson’s scandal coming close to bringing down the UK government.

UK Prime Minister Keir Starmer, who appointed  Mandelson, has insisted Mandelson “lied repeatedly” about his friendship with the ultra-wealthy sexual predator before and during his time working as US ambassador.

A recently released dossier, however, reportedly reveals Starmer was warned about “general reputational risk” posed by Mandelson’s link to Epstein, according to reports.

Last month, ex-prince Andrew was arrested on charges that he shared confidential government information with Epstein — the first time a senior royal has been taken into custody in nearly 400 years.

He had already lost almost everything over his friendship with the perv and his madam, British socialite Ghislaine Maxwell, including his royal titles and even his home.