The Tresspass actress attended the ceremony in Los Angeles on Sunday but insisted that she had no plans to party as hard as some of her fellow stars.
Kidman told US Weekly: "I don't drink [alcohol]. See how boring I am?"
She went on to tell the publication that she would only drink sparkling water throughout the night.
Kidman's husband Keith Urban has said that the couple live a "normal" life and put their family ahead of the showbiz lifestyle.
The country star has credited Kidman with saving his life after she forced him to enter rehab for alcoholism in 2006.