<P> By the fall of 1990 , with Samantha beginning college and Jonathan in high school , Who 's the Boss ? , like other series getting on in years , added a new younger cast member . Producers brought in five - year - old Billy ( Jonathan Halyalkar ) , a kid from the Micellis ' old Brooklyn neighborhood , whose grandmother left Billy in Tony 's care . He moved in with the Bower family in season 7 . Billy was a comic foil to Tony , but also attempted to get into the mix in other characters ' storylines . He only lasted that season , however . In the E ! True Hollywood Story about the series , Katherine Helmond remarked that Halyalkar was a gifted performer , but had difficulty catching up to the pace of the acting and timing the senior cast members had long established with each other . He was written out of the show at the end of the season . In the beginning of season 8 , it was briefly explained that Billy had gone to live with another foster family . </P>
<P> By the fall of 1990 , with Samantha beginning college and Jonathan in high school , Who 's the Boss ? , like other series getting on in years , added a new younger cast member . Producers brought in five - year - old Billy ( Jonathan Halyalkar ) , a kid from the Micellis ' old Brooklyn neighborhood , whose grandmother left Billy in Tony 's care . He moved in with the Bower family in season 7 . Billy was a comic foil to Tony , but also attempted to get into the mix in other characters ' storylines . He only lasted that season , however . In the E ! True Hollywood Story about the series , Katherine Helmond remarked that Halyalkar was a gifted performer , but had difficulty catching up to the pace of the acting and timing the senior cast members had long established with each other . He was written out of the show at the end of the season . In the beginning of season 8 , it was briefly explained that Billy had gone to live with another foster family . </P>
who played billy on who 's the boss
who played billy on who 's the boss
Jonathan Halyalkar
Jonathan Halyalkar