Ant McPartlin was left surprised during Saturday night's episode of Britain's Got Talent as he was reunited with a long-lost relative.The 44 year old was presenting the auditions with co-host Declan Donnelly, also 44, when a contestant dropped the bombshell as they were waiting to go on stage. Ant greeted married couple Katherine and Joe O'Malley onto the show, with Joe interrupting the host as he began to speak.