Sources with direct knowledge tell TMZ ... Nicki and Petty got married Monday at a private home in L.A. We're told the only people who attended -- aside from the bride and groom -- were a minister and several members of their immediate families.
Our sources say Nicki and Kenneth are going the route of Justin and Hailey ... a small, no-frills wedding followed by a church service and massive celebration. As for Nicki and Kenneth ... we're told they're in no rush, but they will plan a big event.
Nicki posted custom bride and groom hats and mugs Monday with the date engraved ... a glimpse into the day's festivities.
Our sources say Nicki and Kenneth were already living as hubby and wife ... even referring to themselves as married, so this isn't a real big change.