"[We] see him rock forward and back in nervousness, but he is smiling, except on the 'til death us do part,'" says Wood. "His bottom lip comes up and over to suck the sadness of the thought of that loss back in. That is incredibly sweet and sad and shows his real love for her. You see him have trouble breathing staying still and calm as she gives her vows."
Moments later, when the couple shared one of their first-ever kisses as husband and wife, "William [kept] his eyes lingering on Kate and Kate quickly [turned] back to the crowd," Reiman explains. "This [was] most likely due to Kate’s excitement at being exposed to this size audience."