Mila Kunis and Ashton Kutcher are apparently taking their relationship to the next level by moving in together.

The Black Swan actress apparently stayed at the Two And A Half Men star's mansion in the Hollywood Hills while work was done on her own home, and it seems the couple enjoyed playing house so much they are making it a permanent arrangement.

A source told Us Weekly: "Ashton's male roommate is moving out to make room for her."

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Mila, 29, and Ashton, 35, are thought to have been dating for several months. They have kept quiet about their romance, although they have been pictured spending time together around the world.

A friend told the mag the couple are "perfect for each other".

Ashton was previously married to Demi Moore, while Mila split from Home Alone star Macaulay Culkin in 2011 after nine years together.