Sharon Osbourne's Lawyering Up For Divorce

Sharon Osbourne is interviewing divorce lawyers ... TMZ has learned.

Sources connected with Sharon tell us, she's mentally ready to take steps to end her 33 year marriage to Ozzy. Since they have no minor children and California is a no fault state, a divorce would boil down to a property settlement.

We're told Sharon decided late last week she would lawyer up. And, our sources say, the fact she and Ozzy appeared onstage together for Thursday's Ozzfest announcement is not a sign they've reconciled. We're told they have not.

Michelle Pugh, the "other woman" at the center of the Sharon/Ozzy split, resurfaced Thursday at the Bev Hills salon where she works, but said nothing.