Jimmy Williams, played by Darcy Tadich, made his first screen appearance on 10 June 2015. The character and casting was announced on 17 May 2015. The role marks Tadich's television acting debut. Jimmy is the young son of returning character Amy Williams (Zoe Cramond) and the first grandchild of established regular Paul Robinson (Stefan Dennis). Paul was unaware of Jimmy's existence due to his estrangement from Amy, but was "overjoyed" to learn that he had a grandson. Jimmy and Paul got along well, but Amy was aware of how "impressionable" Jimmy was and became concerned that Paul might overindulge her son.