Nicole attended the 45th annual festival, held in Telluride, Colorado, alongside her husband Keith Urban, 44.
The 51-year-old is promoting her new upcoming movie, Destroyer, of which she plays a broken detective in the dramatic thriller.
She is also starring alongside Russell Crowe in Boy Erased.
Posing for photos with Keith, the award-winning actress wore a charcoal grey pullover on top of a chequered shirt, paired with blue jeans and black ankle boots while accessorising her simple look with a navy hat.
Keith followed suit with black jeans, a grey t-shirt and khaki jacket.
In one shot, the pair smile lovingly as Nicole pulls her man in close with one arm around his shoulder. The country music star and Moulin Rouge actress also stopped for a photo with Netflix Chief Content Officer, Ted Sarandos.
The festival is held annually over the Labour Day weekend in the US.
