Jessica Biel [1] showed off her postbaby body while attending Amazon Video's Tumble Leaf Family Fun Day in LA on Sunday. The new mom, who welcomed son Silas [2] with her husband, Justin Timberlake [3], in April, looked gorgeous in a floral dress and matching belt. Jessica posed with a few of her friends at the event, including Rizzoli & Isles actress Sasha Alexander.

Jessica's fun appearance comes almost one week after Justin shared adorable new photos of Silas [4] on The Tonight Show Starring Jimmy Fallon and a few weeks after she stepped out to support her brother's purse launch [5]. Keep reading to see more of Jessica, then watch her gush about Silas for the first time [6].