▁equipment ) ▁in ▁a ▁considerable ▁number ▁of ▁films ▁and ▁TV ▁produ ctions . ▁In ▁ 1 9 9 5 , ▁S ull ivan ▁appeared ▁in ▁Blue ▁He el ers ▁for ▁one ▁episode , ▁ ▁and ▁again ▁in ▁ 2 0 0 3 ▁for ▁ 3 ▁episodes . ▁( The ▁Ele ph ant ▁Princess , ▁R ush , ▁T angle ) ▁in ▁front ▁and ▁behind ▁the ▁camera , ▁working ▁on ▁building ▁sites , ▁and ▁assist ing ▁car pent ers . ▁ ▁Before ▁landing ▁a ▁role ▁as ▁Josh ▁Hugh es ▁in ▁Australian ▁soap ▁opera ▁Ne igh b ours ▁in ▁ 1 9 9 8 , ▁he ▁appeared ▁in ▁a ▁string ▁of ▁little - seen ▁features ▁and ▁hom eg rown ▁dram as . ▁Other ▁notable ▁roles ▁include ▁Justin ▁Dav ies ▁in ▁the ▁Australian ▁tele vised ▁serial ▁The ▁Secret ▁Life ▁Of ▁Us ▁( between ▁ 2 0 0 3 ▁and ▁ 2 0 0 5 ), ▁F ear less ▁in ▁the ▁motion ▁picture ▁December ▁Boys ▁( re leased ▁in ▁ 2 0 0 7 ), ▁special ▁agent ▁Wil kins ▁in ▁the ▁main stream ▁feature , ▁The ▁Con dem ned ▁( an ▁American ▁action ▁film ▁distributed ▁in ▁ 2 0 0 7 ). ▁But ▁it ▁was ▁with ▁St ap leton ' s ▁performance ▁in ▁the ▁Academy ▁Award ▁nominated ▁film ▁Animal ▁Kingdom , ▁which ▁premier ed ▁at ▁the ▁ 2 0 1 0 ▁Sund ance ▁Film ▁Festival , ▁that ▁he ▁made ▁an ▁international ▁break through . ▁ ▁When ▁Animal ▁Kingdom ▁won ▁the ▁Grand ▁J ury ▁Prize ▁at ▁the ▁Sund