Michael J. Fox has revealed that his kids have a hard time believing how popular he was in the initial phase of his career.
The 52-year-old Canadian-American actor said that his kids don't believe that he was as famous as 'One Direction' and Justin Bieber are today, Fox News reported.
The 'Spin City' star, who is making a come-back on TV with the new hit comedy 'The Michael J. Fox Show', also admitted that he is no longer the lucky kid who nabbed the life-altering role of Alex P. Keaton in 'Family Ties' 30 years ago.