Isn't the other girl on the hammer-lifting scene Mariah Hill? I forgot really.
If it's an asian actress, I wouldn't be surprised. Hollywood has been inserting locally-popular Chinese celebrities in their films for a while now, cuz that makes it easier to get their films shown in mainland (a booming market these past few years, iirc.) Transformers did it, X-men: Days of Future Past did it, the wolverine sequel did it, Iron Man 3 even filmed a part that was only included in the Chinese release. And DreamWorks even shuttered a studio in the west while building one in China.
