Child actor Rhys Castle-Hughes participated in rehearsals for two weeks and during filming still did his studies.
tʃˈaɪld ˈæktɚ ɹˈiːs kˈæsəlhjˈuːz pɑːɹtˈɪsᵻpˌeɪɾᵻd ɪn ɹᵻhˈɜːsəlz fɔːɹ tˈuː wˈiːks ænd dˈʊɹɹɪŋ fˈɪlmɪŋ stˈɪl dˈɪd hɪz stˈʌdiz.