Al Roker and his wife Deborah Roberts had quite the emotional Sunday as they saw their son Nick grow up right before their eyes.MORE: Today's Al Roker completes Brooklyn half marathon - and he looks incredible!The two took to social media to share over the weekend that their youngest gave the sermon at their church as a graduating senior.VIDEO: Al Roker celebrates son Nick's 19th birthdayThey shared many family snapshots that included Nick in his robes and some while he gave his sermon as they looked on with joyful and with pride.Deborah in particular revealed that she was left in tears as she shared her thoughts, writing: "Sentimental Sunday for this mama. Please allow me to bask and boast a bit about our beautiful youngest, Nick. MORE: Al Roker shares unexpected video for daughter revealing unfortunate health diagnosis"After years of demonstrating what it means to show up, reach high and press on, Nick was chosen to speak about his journey @stjameschurchnyc today." She then paid a heartfelt tribute to him as she added: "Since childhood, Nick has had the kindest heart that is bursting with warmth and wonder and wide open optimism.