"I was ill-equipped as I'd just had a baby. You have pelvic floor problems after having a baby, and bladder control is minimal. Every time I screamed I wore nappies (diapers). Helena Bonham Carter warned her Harry Potter and the Half-Blood Prince co-stars not to get too close during filming.

In addition to "Potter," Helena recently starred in Terminator Salvation. While filming last year, four of her family members were killed in a car crash in South Africa.

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