10/15/2012 at 04:00 PM EDT
was photographed for the first time since giving birth at the beginning of the month to Tennessee James
, her first child with husband Jim Toth
Witherspoon – who is also mom to Ava, 13, and Deacon, who turns 9 this month – looked casual and comfortable in a black top, jeans and sunglasses as she stepped out on Monday in Santa Monica, Calif.
Toth, 42, and Witherspoon, 36, couldn't be happier to welcome the new addition home.
"Everyone is bonding with the baby," a source told PEOPLE
earlier this month.
Especially first-time father, Toth: "Jim has had a lighter workload and has been spending a lot of time at home with the baby at well," the source adds.
Says a family friend
: "He was just over the moon and really excited to become a dad."