Lea Michele and Cory Monteith are moving in together.

The Glee co-stars - who have been dating since Lea split with her boyfriend Theo Stockman in February - are reportedly planning to set up home together at the actress' $1.4 million pad in Los Angeles.

"Lea is telling everyone she's never felt more sure about anything. She's ready for it all, starting with living together and planning their future," a source told Star.

The couple are said to be serious about each other and Lea previously admitted she would only ever consider a relationship with him if it was the real deal, because she didn't want to ruin their friendship: "I think if [an on set romance] was ever going to be an issue, it would have happened by now. I mean, for me, if it was going to happen with anybody, it would have happened with Cory. The moment I met him, I thought, 'This boy is very cute.' But he's like my big brother. He's such a great friend, and I am so happy working with him every day. I'm glad nothing has ever happened because it would have ruined something if it didn't work out."