• "Iron Man" Robert Downey Jr.

"Iron Man" Robert Downey Jr. (Photo : Reuters)

"Avengers: Age Of Ultron" actor Robert Downey Jr. recently walked out from an awkward interview in London.

The interview was intended to promote "Avengers: Age Of Ultron," in which Downey Jr. plays Tony Stark or Iron Man. But when Channel 4 News presenter Krishnan Guru-Murthy asked the actor to explain a comment he made in an interview with the New York Times in 2008, things started to get awkward.

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In the said 2008 interview, Downey Jr. said, "you can't go from a $2,000-a-night suite at La Mirage to a penitentiary and really understand it and come out a liberal. I could pick that apart for two hours and be no closer to the truth than giving you some half-arsed answer right now. I couldn't even tell you what a liberal is."

"Are we promoting a movie?" Downey Jr. asked as he declined to comment on his past experience of serving a prison sentence for drug offences. Things even got worse when Guru-Murthy asked the role his relationship with his father played in his past experience with drugs and alcohol.

Shaking his head, Downey Jr. told Guru-Murthy, "I'm sorry, I really don't (want to talk about that). What are we doing?"

When Guru-Murthy insisted that he was just asking questions, Downey Jr. walked out and said with his microphone off, "It's just getting a little Diane Sawyer in here," referring to the primetime news journalist who conducted the "20/20" interview with Bruce Jenner to be aired on April 24, Friday.

Directed by Joss Whedon, "Avengers: Age Of Ultron" also stars Scarlett Johansson as Black Widow, Chris Hemsworth as Thor, Chris Evans as Captain America, Mark Ruffalo as The Hulk and Paul Bettany as The Vision, among others.

Watch the awkward "Avengers: Age Of Ultron" interview with Downey Jr. here: