Entourage co-stars Jamie-Lynn Sigler and Jerry Ferrara are getting romantically serious - they're house hunting for a lovenest in Hollywood.

The actors met on the set of the hit series and have been dating discreetly since earlier this year.

And now sources tell Us Weekly magazine the loved-up couple has decided to co-habit, and the stars have been scouting the Hollywood Hills for a suitable new home.

An insider says, "They have combined their friends and want a great space to entertain. No marriage yet, but they are definitely moving in together."