The twin sisters — Dolly Rebecca Rose and Charlie Tamara Tulip — celebrated their birthday on Dec. 28, amid sweet wishes from their dad and mom Rebecca Romijn on social media. But the photos posted by O’Connell (jokingly captioned, “Somebody’s Birthday! Shots shots shots!” by the actor) caused a little bit of a stir on Instagram. The first snapshot showed the girls each holding up a shot glass filled with a clear liquid, while the second depicted them downing the matching drinks.