10/20/2012 02:28 pm ET Updated Dec 06, 2017

Reese Witherspoon's Post-Baby Body: Actress Rocks Tight Jeans Three Weeks After Giving Birth (PHOTO)

Hot mama!

Reese Witherspoon showed off her post-baby body Friday as she spent the afternoon shopping with her son, Deacon, who turns 9 on Oct. 23. The mommy-son duo stopped by The Gap before grabbing some Jamba Juice in Santa Monica, Calif.

The new mom, 36, who gave birth to her first child with husband Jim Toth, son Tennessee James, on Sept. 27, was all smiles as she flaunted her svelte figure in tight, cropped jeans and a checkered shirt.

Baby Tennessee has yet to be photographed while the family nests at home with their new addition.

"Everyone is bonding with the baby. And Jim has had a lighter workload and has been spending a lot of time at home with the baby as well," a source close to Witherspoon told People, with a family friend adding, "He was just over the moon and really excited to become a dad."

See photos of Witherspoon's post-pregnancy body below:

reese witherspoon post baby body



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