Jessica Biel Shows Off Her Slim Post-Baby Body in a Sheer Blouse During Rare Outing: See the Style Photos!

Jessica Biel worked her slender post-baby body while out with her brother, Justin, at the BARE Handbags #BareItAll launch in Santa Monica, Calif., on Thursday, Aug. 27; see the photos! Credit: Owen Kolasinski/BFA/Sipa USA

Back to that pre-baby body! Hitting the town for a rare outing, Jessica Biel attended the BARE Handbags #BareItAll launch in Santa Monica, Calif., on Thursday, Aug. 27. And the new mom to 4-month-old baby boy Silas already looked fabulously slim.

Biel, 33, stunned in a semi-sheer lace blouse and navy-blue culottes (both by Self-Portrait), which highlighted her teeny waistline. She accessorized the ensemble with a little BARE top-handle purse and nude heels.

On the beauty front, the Devil and the Deep Blue Sea actress, who shares Silas with her husband of almost three years, Justin Timberlake, modeled a fresh face, including lightly blushed cheeks and a bubblegum-hued lip. A sleek topknot completed the look.

After posing for photos, an onlooker told Us Weekly that Biel was approached by multiple guests, eager to congratulate her on the arrival of baby Silas. Smiling, the Illusionist actress said, "Thank you! It's fun. We're having a good time." She couldn't help but also add, "He's cute."

She had the support of some familiar faces, too. The brunette beauty arrived on the arm of her younger brother, Justin Biel, who was openly affectionate with his big sis at the event. A source said that she was also greeted by an old childhood friend, to whom Biel admitted that motherhood was "hard, but amazing."

Just as sweet, Biel ran into two of her fellow 7th Heaven alums, Beverley Mitchell and Andrew Keegan, at the party, making it a mini-reunion for the stars.

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