The Office actor Brian Baumgartner welcomed a baby girl with his wife Celeste Ackelson last month, his rep tells Us Weekly exclusively -- find out the tot's name here (hint: it's an alliteration!) Credit: Ethan Miller/Getty Images

Sweeter than a cookie! The Office actor Brian Baumgartner, who played sweet-loving Dunder Mifflin employee Kevin Malone on the NBC series, announced via Instagram on Tuesday, Mar. 24, that he's the proud dad to a baby girl.

Baumgartner's rep tells Us Weekly exclusively that the star, 41, and his wife Celeste Baumgartner (nee Ackelson) welcomed their first child on Feb. 19.

The baby girl, Brylee Bea Baumgartner, weighed in at 7 pounds 11 ounces. The new dad shared the news on Instagram as well, captioning a sweet photo: "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."

This is the first child for both the actor and for his wife. Us Weekly exclusively revealed last April that couple wed in Baumgartner's backyard. Their nuptials were attended by another Office alum, Jenna Fischer, and Gossip Girl star Jessica Szohr.

Both Baumgartner and his wife managed to keep the baby's birth — and her entire pregnancy — under wraps. However, the couple wanted to share their special family news with fans on the tenth anniversary of The Office.