The Undoing star with husband, Keith Urban In reality, Nicole is no stranger to trying new hairstyles. In recent years, she has been embracing her curls and cut back on straightening her natural waves in an attempt to achieve the 'Aussie beach girl' stereotype. The mother-of-four told Refinery 29: "I had that hair. I shouldn't have abused my hair. I loved that hair. What was I thinking? I'm working on getting that hair again." Meanwhile, The Undoing became a full family affair for Nicole, who was joined on the set by her daughters with husband Keith Urban, Sunday, 12, and Faith, ten.