Sharon & Ozzy Osbourne -- Living Together Again

Ozzy Osbourne is officially out of Sharon's dog house ... and has moved back in with his wife ... after convincing Sharon he's been drug and alcohol free for months, TMZ has learned.

It's a big step for the couple, considering they split earlier this year ... when Ozzy fell off the wagon.

Sharon insisted she wouldn't take Ozzy back until he cleaned himself up -- and to prove she meant business, she moved out of the family home and into the Beverly Hills Hotel.

But now, it seems Sharon's convinced Ozzy's winning the war with his demons ... because the two not only walked the red carpet together at the Daytime Emmys on Sunday (and shared a kiss) ... they also went home together after the show.

We're told Sharon is determined to help Ozzy stay off the junk -- she's even hired a "sober team" to monitor the rock star 24/7 and help him steer clear of potential hazards.