Johansson not shy about movie nudity

Some Hollywood actresses are cautious about revealing too much skin but 20-year-old Scarlett Johansson had to be persuaded to keep her underwear on, according to The Island director Michael Bay. He said he was prepared for the usual actress nerves when it came to shooting a love scene between Johansson and Ewan McGregor, the two leads.

He was summoned to Johansson's trailer, expecting to reassure the star her privacy and dignity would be protected.

"She's standing there and she says, 'I'm not wearing this cheap...bra. I'm going naked'," Bay said.

He told her the movie was PG-13, and she had to wear the bra.