
In “The Goldfinch,” Wolfhard’s Boris is a Russian-born, street-smart, recalcitrant teenager who has been forced to grow up before his time. Both him and Theo (Oakes Fegley) have been reluctantly cast adrift in the outer reaches of Las Vegas, surrounded by sand and rows of vacant houses, emptied by foreclosure. Apart from being the only two kids within miles, Boris and Theo have misfortune in common: both had mothers who died tragically, and both have neglectful, even abusive, fathers.