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 / Updated  / Source: NBC News

LONDON — Hollywood actor Robert Downey Jr. walked out of a British television interview about his latest film after he was pressed on his past problems with drugs and alcohol.

The 50-year old, who reprises his role as Tony Stark and Iron Man in superhero film "The Avengers: Age of Ultron,” appeared puzzled by British television journalist Krishnan Guru-Murthy's questions as they turned personal.

"Are we promoting a movie?" Downey Jr. asked after the news presenter referred to comments he had made after serving a prison sentence.

The interview, part of a promotional round in which journalists are allocated five-minute slots with the cast, began smoothly but the tone shifted as the journalist asked about the actor's "dark periods ... taking drugs and drinking" and whether he was "free of all that.”

"I'm sorry, I really don't ... What are we doing?" the actor said before walking out.

The interview aired on Britain's Channel 4 News on Wednesday night and Guru-Murthy, who posted it on his Twitter feed, faced angry comments from viewers criticizing his line of questioning.

— Reuters