NEWSPHOTOS: Sienna Miller & GI Joe Invade Australia
By:OK! Staff
July 20 2009, Published 4:15 a.m. ET
With the Transformers and Harry Potter sequels out of the way, it's time for the PR machine for the next hopeful summer blockbuster to kick in.
Sienna Miller, along with her GI Joe: The Rise of Cobra castmates Marlon Wayans, Rachel Nichols and newlywed Channing Tatum made their first major coundown appearance today in Sydney, Australia.
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