Hollywood darling Julia Roberts has three children of her own, and her maternal instinct is stronger than ever.

The Oscar-winning actress, who rang in her 40th birthday last month, says she'd love to take troubled pop star Britney Spears under her wing.

Roberts told Vanity Fair: "I see and hear what's happening to Britney Spears and it's all I can do not to move her into my guesthouse and say, 'Okay, this is how it's going to be!' And just take care of her."

While she's achieved stratospheric success in her career, Roberts now longs for domestic bliss.

She says: "My dream is to be a highly fulfilled and productive stay-at-home mom and wife."