He moved in with the Bower family in season 7 .
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 .
Tony moved in with the Bower family in season 7 .
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 .