Aww!Reese Witherspoon Shares an Adorable Selfie With Son Tennessee

Reese Witherspoon's little boy is growing up so fast!

The Walk the Line star took to Instagram on Tuesday, July 5 to share a sweet photo of herself with her three-year-old son Tennessee — and we're loving the rare snapshot of the two!

"Good 'ol #RedWhiteAndBlue! ?? (Post-nap festivities ?) Hope you had a relaxing holiday, folks!! ❤️ #FourthOfJuly," the 40-year-old actress captioned the sweet pic.

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Reese and her hubby, Jim Toth — whom she tied the knot with in 2011 — welcomed Tennessee in September 2012. The actress is also a mom to daughter Ava, 16, and son Deacon, 12, from her first marriage to actor Ryan Phillippe.

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