Jessica Biel is looking better than ever just four months after giving birth to her first child.

See Jessica Biel With Growing Baby Bump

On Thursday, E! News posted a snapshot of the actress as she stepped out of a gym in West Hollywood wearing a tank top and tight black pants. As she finished her workout, Biel had a big smile on her face for good reason- it looks like she's worked her tail off to keep her body in shape since having a baby.

The site also posted a video clip with more photos of the 33-year-old where she looked athletic all over. Her muscular legs draw out the eye along with her shapely torso.

Justin Timberlake Shares PHOTO Of Baby Silas On Father's Day

See the photos and video here.

Biel became a mommy back in April when she gave birth to her son, Silas. The child's father is Biel's husband, Justin Timberlake.

Meanwhile, Timberlake's friend and former Nsync band mate Lance Bass spoke to OK! last June about how his pal is doing since becoming a daddy.

"I just talked to Justin the other day, he is so happy right now, it's so nice to see," Bass said. "He's a family man anyway, you know."

According to Bass, Timberlake said that marriage takes on a different meaning when a baby comes along.

"He was just telling me the other day even just with my marriage- and I can't wait to have kids with [husband, Michael Turchin]- he was like, 'you don't feel married until you have a kid,'" Bass said.

Tags: Justin Timberlake Jessica Biel