In a sweet Instagram post shared on Friday by Hart, Jameson beamed his big smile at the camera while sporting a red upper lip.
'Lil man just started walking and took a good slam yesterday,' Hart wrote in the caption. 'Bloody nose and all! Even has the war wound to prove it. #1stOfMany #RunsInTheFamily.'
Hart shared a second photo on Friday, with a close-up of his son’s face which showed a much smaller mark above the baby’s lip.
Pink and Hart married in 2006 and welcomed their son in December 2016. They also share 6-year-old daughter Willow Sage.
Just yesterday, Pink announced that she would be raising her children 'gender neutral.'