What a cutie!
“He’s a happy little dude in the morning !! Love this little buddy,” the proud papa, 37, captioned the sweet snapshot of his baby boy donning a bear-print top.
The Grey’s Anatomy alum, 38, and the musician – who are also parents to daughters Naleigh, 8, and Adalaide, 4 – welcomed their son on Dec. 20, 2016.
The couple introduced their son on the cover of PEOPLE.
Later, they shared family photos on Instagram.