United Kingdom, June 4 -- Arnold Schwarzenegger was shocked by his son Patrick Schwarzenegger's nude scene in 'The White Lotus'.

The 31-year-old actor stripped fully naked for a scene in Mike White's hit HBO anthology thriller, and his famous father "couldn't believe" what he was seeing.

During a joint interview for Variety's 'Actors on Actors' series, Arnie said: "I couldn't believe [it].

"I said to myself, 'I'm watching your show, and I'm watching your butt sticking out there.' And all of a sudden, I see the weenie.

"What is going on here? This is crazy."

However, the 77-year-old action movie legend was quick to remind himself that he was also seen in very little clothing for some of his most famous roles.

He added: "Then I said t...