When the cast of The Avengers gathered at the Four Seasons Beverly Hills on Thursday for a post-premiere press conference, director Joss Whedon was completely unaware that his star, Robert Downey Jr., would spill the beans on a hidden scene being shot that night in the Los Angeles area. Whedon himself denied it, but when met up with Chris Hemsworth later in the afternoon, the actor's awkward giggles made it pretty clear that Downey had majorly screwed up. "I cannot comment, on the grounds that it might incriminate me in some way," he said with a smile. "I looked across to [Producer Kevin Feige] when [Downey] said that, and there was that half smile, half 'What are you doing?' sort of look that he gave him. I'm happy to not have said it."

Hemsworth also couldn't say too much about the upcoming Thor 2, but he did dish on his hopes for the eagerly awaited sequel. "I haven't seen the script yet," he said. "But the big challenge is we left Thor with that hope of Jane Foster (Natalie Portman) on Earth, and Thor in another realm, somehow getting together. I think the satisfying thing would be to see that happen. Joss did a great job of conveniently putting her out of the picture [in The Avengers]. So I look forward to that relationship being picked up and continued. Also, [I would like to see] whatever maturity Thor left from the first film really being put to the test. He would like now to think of himself in the position to take on the throne, and be worthy of that position. But we'll see."

And even though casting is miles away from completion, Hemsworth said he wouldn't mind too much if an old comic favorite — Beta Ray Bill — stopped by. "That was one of the first comic books I read, actually," he said. "I've got to say, I remember reading that guy going, 'What is this kind of half-horse looking character?' By the end of it I was, 'Okay, I get this and I like it,' but my first instinct was a bit unsure of it all. He was the only one that could pick up the hammer, but he looked like a horse."

When it came to The Avengers itself, Hemsworth said that working with Whedon for the second time (The first was in the superb Cabin In The Woods), made him realize that humor is a crucial element for successful films. "[Joss] was more involved in [The Avengers] obviously, but that same sort of wit and humor that you see in Cabin is rife through Avengers. Humor is the strongest personality trait that I think we identify with, and remember afterwards. That's why I think [Joss] has been so successful. If we're not having fun, what are we doing here?"

Indeed, Whedon fans can expect to see loads of the razor-sharp dialogue that they've loved since the days of Buffy in Avengers -- and according to Hemsworth (and Samuel L. Jackson, during the conference), Whedon was very protective of his witty words throughout production. "Joss had written the script, so there was certainly more of an attachment to the dialogue," he said. "Sam talked about the policing of the script, which was fine. It's a different way of working. [Thor director] Ken [Branagh] was a bit looser in that sense, but neither is right or wrong."

Finally, when asked if there was any box office beef between Hemsworth and his younger brother, The Hunger Games star Liam, he swore that the competition was all friendly. "That's the last question in case it pisses me off, isn't it?" he laughed. "No, I mean, that film doing so well was just a huge benefit for anyone in this business. The box office seems to sway and be more unpredictable than ever, and the idea that people aren't going to the movies anymore is not good for anyone in our position. And we even had our trailer in front of the film, so I was excited about that. We have a healthy competitive relationship, my brother and I. It's all a plus."

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