In 'The Goldfinch', Finn Wolfhard portrays the younger version of Boris Pavlikovsky, a pivotal character in the film adaptation of Donna Tartt's Pulitzer Prize-winning novel. The story revolves around a young boy named Theo Decker, who survives a terrorist attack at an art museum and becomes entangled in a world of art forgery and crime. Finn's performance showcases his versatility as an actor, as he brings depth and complexity to the troubled character of Boris.