Footballer Andy, 26, posted the adorable snap to Instagram, showing Arlo's tiny hands clutching onto his dad's.
"Hand in Hand In Hand!! □ [sic]" he gushed.
Andy and his fiancée Billi, 27, took Arlo for his first outing last night, and the yummy mummy indulged in her first glass of fizz in nine months.
Posting a picture, she wrote: "My first drink #WorthTheWait #NewMummy #LittleAC [sic]"
The former TOWIE star also uploaded a snap of her pushing Arlo in his pram, looking sensational for someone who gave birth just five days ago.
She wrote: "First Night Out With My Little Family ❤️ @andytcarroll □ [sic]."
Yesterday Billi revealed her bundle of joy weighed 7lbs 15oz when he was born, and he shared Thomas as a middle name with dad Andy.
While Arlo is Billi's first, Andy is already dad to daughter Emilie Rose and son Lucas from previous relationships.