The official promo machine for the new film G.I. Joe: The Rise of Cobra has officially gotten underway as members of the cast invaded Sydney Harbor in Sydney, Australia over the weekend to hype up their new film. The cast — including Channing Tatum, Sienna Miller, Rachel Nichols and Marlon Wayans — arrived at their press photocall by speedboat and then immediately made themselves available to the press. Sienna Miller gave the most revelatory info to the assembled media, even confessing that she nearly burned her breasts while making the film:

In what would have been the most bizarre on set accident yet, actress Sienna Miller revealed she nearly burnt her breasts making new movie G.I. Joe: The Rise of Cobra. Speaking at an event in Sydney, Australia, to promote the film, the 28-year-old star, who plays femme fatal The Baroness in the film, said she nearly suffered the rather undignified occurrence when an explosion got too close for comfort. But thankfully it was just a rather close call. She said a press conference in Sydney: “Luckily it wasn’t my breasts, it was the bit in-between. It got a bit burnt when an explosion got a bit close.” Sienna arrived at the press launch for the film in fine style, as she and her cast mates turned up in a power boat. And she also revealed she wasn’t too impressed with her character’s black leather cat suit: “I won’t be wearing one again. Squeezing myself into that with the aid of talcum powder every day for five months was more than enough. I could barely move in it anyway,” she said. The actress looked informal in a print dress from Brit designers Poltock & Walsh Autumn/Winter 2009 collection, accessorised with a pair of suede/leather Chloe ankle boots. Sienna who has enjoyed an on/off relationship with father-of-four Balthazar Getty, brushed off questions that she had plans to walk down the aisle. She said: “No plans to get married, no. No-one to marry!” But co-star Channing Tatum, 29, was actually on his honeymoon. Channing, 29, who married Step Up co-star Jenna Dewan on July 11, had to delay his honeymoon because he will be promoting the new $170million movie for two weeks. He said: “I am on honeymoon but not at the moment. We’ll pick that up after the promotion work is done.” The star, who plays the film’s hero, Duke, said: ‘When I was first approached about the role I thought, “Aww man, how are you going to make a movie about G.I. Joe in a time of war? Then I read the script and it was nothing to do with the military at all. I’m a big supporter of the soldiers and the military and I don’t have a view on the war at all, I’m not a political person. But this is a fantasy film, it is an escape from everything that is going on.” Also at the event were co stars Marlon Wayans and Rachel Nichols who arrived at Sydney’s historic harbour with Sienna and Channing in a customised speedboat. Director Steven Sommers also rejected claims that he had been removed from the film after disastrous test screenings. “It’s complete lies. I have always had final cut of the film. People just make stuff up. You have to really screw up to get fired from a movie. The stigma of that would kill it. This is not the case.” Actor Channing, 29, said: “I hope it does OK”, while a less tactful Sienna added: “You know, GI Joe, it’s not going to be the best acting work we’ve ever done.”

LOL! Not even the actors seem to have much faith in the film … but, I’m still VERY excited to see it when it opens next month!! It’s a shame that Channing has to “work” while he’s on his honeymoon but it’s really hard to feel bad for the guy. It remains to be seen where the G.I. Joe promo machine moves on to next but they’ve got a lot of work ahead of them to sell this flick. Are any of y’all planning on seeing this movie when it opens on August 7?

[Photo credit: Wireimage; Source]