Naomi Watts is apparently walking Nicole Kidman through pregnancy, step-by-step. Which, she says, is exactly as it should be:

"Whenever you're pregnant, you always call on your pregnant friends and compare notes," Watts told PEOPLE.com on Monday. "It's what happens in friendship."

She added, however, that Nicole - who adopted two children, Connor and Isabel, with Tom Cruise - wouldn't need her advice on being a mom. "She's already a great mum," she said.

BFFs are good to have around when you're a pregnant megastar, no?

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