Martin Sheen dresses up as Dame Edna Everage on the housewife megastar's new chat show tonight.

The Apocalypse Now actor draws gasps as he arrives on set in the Dame's trademark wig, dress and glasses, but the real Dame quickly follows him to snatch off his wig and reveal the imposter.

She later exacts her revenge on Sheen by revealing her daughter Valmai sharing a jacuzzi with his son Ramon.

The Dame Edna Treatment airs tonight at 9.40pm on ITV1.