On Location: Keira Knightley

Actress Keira Knightley is wrapped under a blanket as she rehearses a scene on the film set for "The Duchess" on Nov. 15, 2007, in Bath, England. Knightly stars as 18th century aristocrat Georgiana, Duchess of Devonshire, an ancestor of Princess Diana who was alternately celebrated and reviled for her extravagant political and personal lives.

Keira Knightley is wrapped under a blanket as she rehearses a scene on the film set for "The Duchess" on Nov. 15, 2007, in Bath, England.

Keira Knightley huddles under a blanket as she rehearses a scene on the set of her new film, "The Duchess" on Nov. 15, 2007, in Bath, England.

Keira Knightley tries to keep warm as she wait to film a scene for the upcoming film "The Duchess" on Nov. 15, 2007, in Bath, England. The drama, also starring Ralph Fiennes, hits theatres in 2008.

Keira Knightley shares a joke with the film crew as they rehearse a scene on the film set for "The Duchess" on Nov. 15, 2007 in Bath, England. The film, also starring Ralph Fiennes, began filming in mid-September at a number of locations in England.

Keira Knightley laughs as she waits on the film set for "The Duchess" on Nov. 15, 2007, in Bath, England. The film hits theatres in 2008.

In character as Georgiana, Duchess of Devonshire, actress Keira Knightley waits on set of "The Duchess," Nov. 15, 2007, in Bath, England.

Actress Keira Knightley waits for her cue on the film set of "The Duchess" on Nov. 15, 2007, in Bath, England. Knightly stars as 18th century aristocrat Georgiana, Duchess of Devonshire, an ancestor of Princess Diana who was alternately celebrated and reviled for her extravagant political and personal lives.

Keira Knightley laughs as she walks onto the film set for "The Duchess" on Nov. 15, 2007, in Bath, England.

Keira Knightley walks with co-star Dominic Cooper as they rehearse a scene on the film set for "The Duchess" on Nov. 15, 2007, in Bath, England. In the film, Knightly portrays Georgiana, The Duchess of Devonshire and Ralph Fiennes is Duke of Devonshire.

In this image released by Paramount Vantage, Keira Knightley stars as Georgiana, the Duchess of Devonshire in "The Dutchess." The film is scheduled to hit theatres Sept. 19, 2008.

CBS News 24/7