Kate Beckinsale as Annie Marchand in a scene from 'SNOW ANGELS'

The British beauty plays a single mother who has an affair with a married man in the upcoming film, leading to the mysterious disapperance of her daughter.

But the Underworld star became so wrapped up in the role, she had to hide from her own daughter Lily - so the nine-year-old wouldn't catch her in a distressed state.

She tells U.K. magazine Closer, "It was too intense. I didn't want Lily to see me in that state - it exhausted me on a psychological level."

Source: WENN