In a new interview, 'Avengers: Age of Ultron' and 'Iron Man 3' star Robert Downey Jr. spilled the beans on multiple topics including's Tony Stark's relationship with future Avengers member, The Vision, in the upcoming film.

"All I can think about is Paul Bettany. I could go out to dinner every night with Paul Bettany for the rest of my life. He is the most charming, funny, cool guy in the world. And his relationship to Vision, I can't really disclose too much. But I want to say that the way that Vision occurs is absolutely astonishing," said Downey Jr to i09 in an interview.

"And what I saw, because I was in close proximity to Bettany, everybody feels like they have a sense of him from playing JARVIS, and Vision isn't JARVIS. When you see what Bettany does with Vision, I think you're going to really dig it," he added.

The 49-year-old actor also talked about what it's like to play as one of the most popular characters in Marvel history.

"Well, tell me if you relate to this: I think we're responsible for entertaining ourselves in life. And Tony is kind of this cornucopia. There's always another angle on him," said Downey Jr., "If you're living rent-free in an $8-billion tower in New York, how bad can that be? Until he starts messing it up."

Downey Jr also revealed what fans can expect to see in the new movie next year, thanks to film director Joss Whedon's leadership.

"These are about as high [expectations] as they've been. But the nice thing in Age of Ultron, what Joss Whedon has done exceptionally well - I've never really seen it done like this before - [is that this movie] really is a Swiss Watch of character and action and stakes. It's easily the best bad guy plot I've ever read in a script, let alone gone out and shot," said Downey Jr.

Robert Downey Jr. (Iron Man), Samuel L. Jackson (Nick Fury), Scarlett Johansson (Black Widow), Chris Evans (Captain America), Mark Ruffalo (Incredible Hulk), James Spader (Ultron), Elizabeth Olsen (Scarlett Witch), Aaron Taylor-Johnson (Quicksilver), Jeremy Renner (Hawkeye) and Chris Hemsworth (Thor) are among the numerous actors set to appear in the movie when the blockbuster series returns on May 1, 2015.