First they cast the roles of half - brothers Liam ( Maxim Baldry ) , Jesse ( Luke Jerdy ) and Adam Donovan ( Jimmy Essex ) .
In 2016 , producers created an extended family for Grace .
First producers cast the roles of half - brothers Liam ( Maxim Baldry ) , Jesse ( Luke Jerdy ) and Adam Donovan ( Jimmy Essex ) .
In 2016 , producers created an extended family for Grace .