From co-stars to living together!

Ashton Kutcher and Mila Kunis are making arrangements to start living together, according to Radar Online.

"[T]he happy Hollywood couple are primed to live together at the Two and a Half Men star’s 9,000-square-foot Hollywood Hills mansion, as Ashton’s male roommate has already left in anticipation of Mila moving in," says Radar Online.

Word has it that Ashton asked Mila to move in with him, and now the former That '70s Show stars are looking forward to sharing his place.  

“They really are perfect for one another,” a source tells Us Weekly, pointing out that “they always have a lot of fun together.” 

Apparently, Ashton likes that Mila is so low-key and enjoys staying in. 

“They like to chill out,” says a source. “That’s Mila’s M.O.” 

Mila's next film, Oz the Great and Powerful, opens next month, while Ashton can be seen as Steve Jobs in jOBS this April.

Best of luck, you two crazy kids!

Sources: Us WeeklyRadar Online