Kidman gushed about her two youngest daughters, Sunday Rose, 9 and Faith Margaret, 7, during her speech and many fans have since criticised the actress for not mentioning her adopted children, Isabella, 25 and Connor, 22, who she shares with ex Tom Cruise.
The Big Little Lies star won Best Actress for her role in the series used her speech to thank husband Keith Urban, her mother Janelle and sister Antonia, as well as her two youngest children whom she shares with Urban.
Nicole said, 'First cab off the rank, yikes. Thanks. That means my daughters are still awake so Sunny, Faith, I love you, I'm bringing this home to you babies.'
Social media wasn't impressed.
News.com.au reports the reason Nicole fails to speak about Isabella and Connor is due to their faith - Scientology. Their father Tom Cruise is an outspoken member of the Church of Scientology, and it is believed Isabella and Connor were also raised in this religion, and Kidman is not allowed to mention them or their ties to the controversial faith.
It has been reported that when a Scientologist leaves, they are often cut off from their families and labelled a 'suppressive person' or 'SP'. The publication reports that Kidman has been labeled an 'SP' by her adoptive children, and they have cut all ties with her.
You can watch Nicole's full acceptance speech below.