The Big Little Lies costars and executive producers are currently “working on storylines,” for a potential second season of the HBO miniseries.
Kidman’s fellow Australian actress, Naomi Watts, also marked the big day on social media.
“Happy Birthday to this beautiful woman,” Watts captioned a pic of the pair hugging. “A remarkable human who gives so much love and spirit to all those around her. My friend, I am so happy to have shared incredible experiences with you over the last 3 decades. May there be many more to come... ??????????.”