Demi Moore's ex-husband Bruce Willis has moved into her building in New York City.

The 50-year-old actress - who has three daughters with the Die Hard actor, Rumer, 24, Scout, 21, and 18-year-old Tallulah - is "really happy" that the star, 58, and his wife Emma Hemming have purchased a unit near hers inside the luxurious San Remo apartment block.

"Bruce and his wife, Emma, just moved in. Demi is really happy. They both love their kids and living in the same building will give them a lot of privacy," a source said.

The former couple are still on great terms and Bruce has supported Demi since her split from Ashton Kutcher. "Bruce has been her shoulder to lean on through the divorce with Ashton," the insider added.