7:51 PM PT -- An NYPD official tells us Mootreddy has been officially arrested and booked on charges of criminal trespass (misdemeanor), trespass (violation), 2 counts of stalking (misdemeanor), and harassment (violation).
The woman who told the world she married Pete Davidson -- even though she didn't -- showed up inside his NYC home ... according to cops.
Law enforcement sources tell TMZ ... Michelle Mootreddy is currently in police custody being questioned by detectives after she allegedly slipped inside Pete's Staten Island crib.
Our sources say Mootreddy walked into Pete's place through an open side door Thursday and sat down at the kitchen table. We're told one of Pete's relatives was home, and someone called 911. We're told Pete wasn't home at the time.