Smith has said his mother Rita "wasn't supposed to have me", which was the reason for the significant age gap between him and his two elder siblings. "And once they got me, they didn't like the idea of having an only child, so they had my sister. Which is good, because I would have hated not having a younger sister". He has described his younger sister Janet as a "piano prodigy" and "the family's musical genius", but said that she was too shy to become a performer herself.