Duhamel and Fergie first became parents in 2013, but it looks like they're in it for round two! The Lost in the Sun actor recently dished to People about their plans to give Axl a baby brother or sister one day—but well after Fergie releases her sophomore album, which is slated to release later this year.
In the meantime, Duhamel and Fergie are busy running after their toddler and chronicling some of Axl's sweetest moments on social media (like whether he's rooting for dad's team, the Minnesota Vikings, or mom's team, the Miami Dolphins).
Duhamel takes care not to share too much about his son on Instagram, but when he does, it's enough to double-tap. In honor of the 43-year-old actor's special day, take a look at 7 heartwarming father-son moments: