In 1973, Hewer got married to Margo Spindler. As a married couple they welcomed two children together. They dissolved their married life in 1985. Since then time, news about his extra love affairs has not been heard in the media.
With the start of 1960s, he moved to London and then at the age of 20, he joined a PR consultancy as a trainee. The good news was that he became the sole shareholder and the owner of this constancy within six years. However, after being the owner for about two decades, he sold this agency in 1998. With the start of 2012, he was announced the host of the game shows Countdown. He is also an actor and has also appeared in the BBC series, Who Do You Think You Are?. The real figure about his salary is unknown but his net worth is rumored to be around £30 million.