Who do you think would be the best actors to play Billy and Mandy from Grim and Evil?

Billy = Adam DeVine (I low key think his persona is influenced by Billy, Adam Demamp seems drawn from him too, and they all share a derpy physicality I would say)

Mandy = Aubrey Plaza? Doesnt "look" like Mandy at first but April from Parks and Rec seems very Mandy