The pair comes into the side replacing Heath Hocking (calf) and Joe Daniher (omitted) from the team that took on Gold Coast.
Bellchambers and Dempsey have not played since Round 10 against Sydney.
Bellchambers dominated the VFL with 23 disposals last week in a best on ground display against Williamstown.
Dustin Fletcher is set to sit out another week with groin tightness with Tayte Pears retaining his place in the side.
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