Brian Baumgartner, Celeste Ackelson

The Office alum Brian Baumgartner married his girlfriend Celeste Ackelson on Saturday, Us Weekly reports.

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The ceremony took place in Baumgartner's backyard, and guests included his Office co-star Jenna Fischer and Gossip Girl star Jessica Szohr, according to Us. There's no word on whether the groom wore shoes or tissue boxes down the aisle. 

Baumgartner, 41, has one child from a previous marriage.

Watch The Office's (first) wedding episode, "Niagara," here.