How sweet!

Lauren Bush Lauren took to Instagram on Sunday, Dec. 20 to share a festive photo to celebrate her son James' one month — and we can't get over how adorable the little one is!

"Happy 1 month to my little holiday elf! I love you Baby James!," she captioned the sweet snapshot of him all bundled up.

RELATED: Pregnant Lauren Bush Lauren Shows Off Growing Baby Bump on Instagram — See the Pic!

Former President George W. Bush's niece and her husband, David Lauren, 44 — who tied the knot in 2011 — welcomed their first child, James, on Saturday, Nov. 21.

Click through our gallery below to see more of Hollywood’s cutest kids!