The sweet snapshot features 41-year-old Duhamel and 9-month-old Axl in Team USA jerseys. The little tot happily sits on his daddy's shoulders and laughs with his fingers in the air. Like Axl, Duhamel grins and holds his arms up in a victory pose, too.
"GO #USA!!! (or a Portugal/Ghana tie would be fantastic) #USMNT #LetsDoThis," Duhamel captioned the pic.
Not present in the picture was mom Fergie, who Axl seems to be taking after as he grows up. In April, the Black Eyed Peas frontwoman gushed to Us Weekly about her little one, adding that she and Duhamel would like to expand their family. "We definitely want another one," Fergie told Us. "But there are no plans anytime in the near future."
Daddy Duhamel told fans during a Reddit AMA in March that he loves "watching [Axl] develop into a little boy." He said, "Sitting up, holding a bottle or cursing around in his walker. You don't think it's a big deal… until you see your kid doing it."