The 32-year-old actress, who is pregnant with the couple's first child, has been spotted on the set of The Devil and the Deep Blue Sea on a daily basis alongside co-stars Jason Sudeikis and Maisie Williams.
Biel braved NoLa's cold temperatures in a puffy beige jacket during her time with Timberlake. Sources told E! News the couple was "all smiles" during their encounter, after which she was spotted heading back to work as Timberlake, 34, drove away.
Biel will play a character named Penny in the forthcoming film, the details of which remain under wraps.