Reese Witherspoon Re-Emerges, Gives Glimpse of Post-Baby Bod After Son Tennessee's Birth!

Reese Witherspoon out and about in Santa Monica, California on October 15, 2012 for the first time since giving birth to son Tennessee James Toth a couple of weeks ago. Credit: GoldenEye / London Entertainment

Tennessee's mama is almost ready for her post-baby closeup!

Reese Witherspoon was photographed in Santa Monica on Monday Oct. 15 -- the first time the Oscar winning actress, 37, has been snapped since giving birth to son Tennessee James Sept. 27.

For her low-key sojourn, the Devil's Knot star kept it casual in sunglasses, a baggy black sweater, cuffed jeans and ballet flats.

Witherspoon's first child with husband of a year and a half Jim Toth, Tennessee James joins siblings Ava, 13, and Deacon, 8, the star's kids with ex-husband Ryan Phillippe. "She knew early on she was having a boy," a source told Us of the boy named after her home state.

"The kids met the baby the first day at the hospital," the insider said. "Deacon is excited to have a brother, and Ava can't wait to babysit."

Another babysitter at the ready is Tennessee's maternal grandmother, Witherspoon's mom Betty, who traveled from Nashville and is living in a rented apartment near the family's home in L.A.'s Brentwood area. "She'll help Reese take care of the baby, along with a nanny," explained the source.