The actor - who played lovable Dunder Mifflin employee Kevin Malone - has welcomed baby daughter Brylee Bea with wife Celeste Ackelson.
Brian shared a very cute image to Instagram showing him alongside his sleeping newborn.
The caption read: "My latest project. 9 months in the making. I am happy to announce the arrival of my daughter - Brylee Bea - healthy and very happy. She told me she looks forward to catching up on all the old episodes of The Office once her eyes adjust to life."
Congrats to Brian and Celeste!
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