kristin-cavallari-baby girl

New mom-of-three Kristin Cavallari posted the first photo with daughter Saylor via Instagram Sunday.

“Really sad about missing my 10 year high school reunion last night…so many people I wanted to see…but at least I have a good excuse,” she captioned the sweet shot.

On Nov. 23, The Hills alum, 28, and her NFL star husband, Jay Cutler, 32, welcomed their daughter.

“Saylor James Cutler was born today at 132pm!!” the reality star-turned designer announced via social media.

The newborn girl joins big brothers Camden, 3, and Jaxon, 18 months.

Really sad about missing my 10 year high school reunion last night…so many people I wanted to see…but at least I have a good excuse

A photo posted by Kristin Cavallari (@kristincavallari) on Nov 29, 2015 at 9:52am PST