03/01/2012 10:09 am ET Updated Mar 01, 2012

Michelle Williams Steps Out With Daughter Matilda (PHOTOS)

Just days after she stunned at the Oscars in a lacy Louis Vuitton gown, Michelle Williams stepped out for a low-key lunch with daughter Matilda. The 31-year-old actress was seen toting her 6-year-old daughter, whose father is late actor Heath Ledger, in Los Angeles for a casual play date.

The "My Week With Marilyn Star" told Tim Gunn on the red carpet on Sunday that Matilda had helped out in picking out what to wear for that night's ceremonies, where Williams was nominated for her third Academy Award.

Williams also dedicated her award to Matilda in January, when she picked up the Golden Globe for Best Actress in a Musical or Comedy.

"'I consider myself a mother first and an actress second, and so the person I most want to thank is my daughter, my little girl, whose bravery and exuberance is the example that I take with me in my work and in my life," she said.