Baumgartner, who played the lovably deadpan Kevin Malone on the popular comedy, wed Celeste Ackelson on Saturday in a backyard wedding. Office alums Jenna Fischer, John Krasinski (with wife Emily Blunt), Oscar Nunez and Angela Kinsey all attended the nuptials, according to TMZ.
And the mini Office reunion makes sense: Baumgartner, 41, told PEOPLE that the Office cast is his "second family" as the show wrapped in 2013.
"We've all grown up together. Our lives have changed together. We've seen weddings and divorces and kids, success and failure," he said at the time.
This is the second marriage for Baumgartner, who has a daughter from his previous relationship.