Classic: Angelina Jolie strikes a classic pose in the new spring campaign for U.S. womenswear label St. John.

With none of her trademark tattoos in sight, Angelina Jolie models the new range of clothing brand St. John - looking a world away from her tough action girl role.

A demure-looking Angelina looked every inch the old school Hollywood beauty with her shiny brunette hair piled loosely on top of her head, while wearing a classic LBD from the American luxury label.

The shoot took place several weeks ago, before the actress' bump confirmed reports that she was pregnant with twins.

UN goodwill ambassador Angelina took the modeling job along with a spokesperson role as the voice of the company's charity, which was created in support of children's issues and causes.

"She's a mother, actress and a philanthropist," said Richard Cohen, chief executive officer of St. John.

Jolie, 32, signed with St. John in September 2005. At the time, she said she was excited about working with the clothing line.

"I am a working mother who has set goals to accomplish a lot in this world," she said.

"I want my wardrobe to be beautiful, sexy and comfortable all at the same time. St. John is all of those things."

Brad Pitt and Angelina are also adoptive parents to Zahara, three, Pax Thien, four, and have a biological daughter Shiloh Nouvel, 21 months.