#DylanSprouse is about to be a Big Daddy. The former child star and his wife, supermodel Barbara Palvin, are expecting their first child. The parents-to-be subtly announced the news at the Cannes Film Festival on Thursday. On the red carpet at the premiere of 'Histoires Parallees' ('Parallel Tales'), Palvin — dressed in a baby-blue gown — posed with her hands cradling her pregnant belly. Following the event, Palvin and Sprouse made the news official on Instagram with a carousel of photos including a glimpse of their baby’s sonogram with the little one’s fingers forming the “rock on” symbol. In the third slide, the couple make the same hand gesture. For a caption, Palvin chose three “sign of the horns” emojis. See more at the link in our bio. 📷: Barbara Palvin/ Instagram; Getty