The Oscar-winning actress, 51, posed in a sharp white Ermanno Scervino ensemble at St George's Open Air Cinema in the city's Royal Botanic Gardens.
Speaking on the red carpet Kidman told Daily Mail Australia that her two youngest children who she shares with husband Keith Urban, Faith Margaret, 8, and Sunday Rose, 10, were not going to see her latest R rated film.
Nicole told the publication: "They're not seeing this film right now because it's an R-rated film, they don't see anything R rated."
Although Destroyer was off-limits, her two daughters were allowed to see her blockbuster film Aquaman: "They see the PG, they saw Aquaman and they loved it."
Nicole Kidman has been making the most of her time in Oz, as she was seen enjoying the Australian Open with her hubby Kieth Urban, and Vogue editor-in-chief Anna Wintour.