Eamonn Holmes shared the joyous news that he had become a grandfather, as his eldest son, Declan, had had his first child with wife Jenny.MORE: Ruth Langsford and Eamonn Holmes' immaculate garden rivals the Queen'sThe star shared the news live on This Morning, and in his social media posts since fans have sent many congratulatory messages.WATCH: Eamonn Holmes has heartfelt message for fans following the birth of his granddaughterOn Saturday, Eamonn uploaded a clip to his Instagram thanking fans