Reese Witherspoon Shares Sweet Mother-Son Pics With Son Tennessee: 'Sunday Funday'

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Reese Witherspoon spent Sunday cuddling with her adorable youngest child, 4-year-old Tennessee.

The 41-year-old actress Instagrammed photos of the two relaxing in a hammock together, matching in white and blue looks. Gold balloons reading "fiesta" made for festive decorations for their "SundayFunday."

"Napping style. #FiestaMoreLikeSiesta," Witherspoon joked.

PIC: Reese Witherspoon Shares 4th of July Selfie With Look-Alike Daughter Ava

Of course, the actress has definitely earned her relaxation time. Witherspoon has been busy with multiple projects, including Disney's highly anticipated adaptation of Madeleine L'Engle's beloved children's fantasy, A Wrinkle in Time. ET spoke with Witherspoon and her co-stars, Oprah Winfrey and Mindy Kaling, at Disney's D23 Expo at the Anaheim Convention Center on Saturday, where they talked about bonding while getting hours of makeup done for their roles.

"We had a lot of major conversations in the hair and makeup room every morning. It was great camaraderie from the very first day," Winfrey shared. "Reese was head DJ, down at the end chair, playing music that I hadn't heard since 1945. Who knew that she had all this soul sister in her? Al Green [was] rocking us out and so were a whole lot of people."

WATCH: See Oprah Winfrey Expertly Mix Margaritas for Reese Witherspoon at the 'Wrinkle In Time' Wrap Party

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