Share Alex explained his on-screen daughter in Amazing Grace, Sophia, is actually 17, so it's not impossible that his character could be a grandfather. 'I'm 47. Sophia's 17. It's really not impossible at all even though it seems a little far fetched for my own life,' he said. Believable: Alex told TV Tonight his on-screen daughter in Amazing Grace, Sophia, is actually 17, so it's not impossible that his character could be a grandfather 'When you sit down and do the math, well, actually… it's totally feasible.' Alex portrays Kirk in Amazing Grace. The series follows his teenage daughter as she tracks down her birth mother before welcoming her own child.