'The Office' -- Dunder Mifflin Reunion For Kevin's Wedding

Just like the show's series finale, the cast of "The Office" got together for a wedding -- only this time it wasn't for Dwight Schrute.

Brian Baumgartner -- a.k.a. Kevin Malone -- tied the knot in his backyard Saturday in LA ... and was joined by former co-stars Jenna Fischer, Angela Kinsey, John Krasinksi and Oscar Nunez.

It doesn't look like Steve Carell made a cameo appearance at this wedding ... but it's obviously 'cause he and Holly are busy taking care of the kids.