She's expected to face a judge Thursday.
Photographs have already shown New York-born Sienna puffing away in front of son Rafferty, six.
There are also feature films for adults and short, but very juicy videos, from which a cock gets a stake.
After a quick call on her mobile and a sneaky ciggie to steady her nerves, the Cold Mountain star felt ready to face the waiting directors.
But Sienna, 21 - Jude's co-star in the new remake of Alfie - has been hooked since she was 14 and will find it very hard to quit.
Sherry was a dancer and singer before becoming an actor.