"I’ve had severe morning sickness," the expectant actress, 40, told Access Hollywood on Monday – when she and husband Keith Urban hit the red carpet at the CMT Awards in Nashville.
Kidman, wearing a figure-hugging red dress that revealed a burgeoning baby bump, also admitted to wondering if the most difficult part is yet to come.
"[I'm] good actually, really good. Waiting for the third trimester," she said. "Everyone says that is hard work."