The Welsh actor was spotted cuddling up to a bikini-clad blonde in sunny Ibiza who was a doppelganger of Sienna, who dumped Rhys in June after an 18-month relationship.

The Notting Hill actor was, by all accounts, devastated by his break-up with the Factory Girl star but, in recent weeks, has bounced back on the dating scene and enjoyed a fling in London with Rod Stewart’s daughter Kimberly.

Of his lithe young friend in Ibiza – where he holidayed with Sienna only a year ago – an onlooker said: “I thought it was Sienna for a minute but after a closer look it turned out to be her double.”

Ifans was also seen enjoying a paddle in the sea with a darker-haired, bikini-clad chum.

Sienna, eat your heart out!