On Sunday morning, a new black-and-white photo was posted on the couple's Instagram account featuring the nearly six-week-old baby clutching his father's finger as the doting dad holds him in his lap.

Archie Harrison Mountbatten-Windsor and Lilibet Diana Mountbatten-Windsor are the son and daughter to The Duke and Duchess of Sussex, Prince Harry and Meghan Markle. Click through the gallery to see ...