Nicole Kidman, who stars in the new erotic thriller film 'Babygirl', spoke to PEOPLE for One Last Thing and revealed how husband Keith Urban still manages to surprise her

Babygirl star Nicole Kidman has been married to Keith Urban since 2006, after meeting the year before. They share two daughters, Sunday Rose and Faith Margaret, and split their time between Nashville,

Kidman also shared she is quite emotional about their relationship overall. She revealed her favourite song is Once in a Lifetime, which Keith Urban recorded five months after the couple married.

Heidegger said the phrase “babygirl” comes from a type of kink play referred to as “ DDLG, ” which stands for “Daddy Dom/Little Girl.” In these scenarios, a dominant partner “Daddy” guides and nurtures the submissive partner “little girl.

Kidman then turned the conversation to Babygirl, the upcoming film in which she plays a high-powered CEO who begins a sub-dom affair with her young intern (played by Harris Dickinson).