Michael Strahan has had some career-defining moments as a former NFL athlete and celebrated TV host, but nothing could prepare him for a life lesson he dealt with over the summer.The GMA star left fans in disbelief when he shared a family update involving one of his twin daughters. Taking to Instagram, Michael shared proud snapshots of Sophia and her date who were heading off to prom. MORE: Michael Strahan's new photo with teenage daughters leaves fans wondering the same thing He captioned the image: "I was not ready for this moment to see one of my babies go to prom! @sophialstrahan looked beautiful with her date Sebastian at #Prom! @michaelstrahanbrand."WATCH: Michael Strahan's teenage daughter Isabella makes her catwalk debut The 17-year-old looked beautiful, wearing a bright red dress and strappy high heels. Fans were blown away by the fact the teen was of prom age already and commented: "She’s beyond gorgeous. You done good dad.