Evangeline Lilly?
Is that her in the middle of the screen, below the red head guy and his mouthy gf in the opening scene?
"Worthington, we're being attacked by giant bats!"
She was Del Toro and Phillipe's fluffer. They shared her between takes and they gave her a role as an extra to express gratitude.
I won't ask you to trust me. It's the cry of a guilty soul.
I'm willing to suspend disbelief for this.
..That sums up this movie perfectly btw.