Clarke, who is making his feature debut, will play a young Severus Snape. While Gilbert will play Scorpius Malfoy, the son of Tom Felton's Draco Malfoy. Scorpius appears in the Epilogue portion of the finale, which has recently been reshot. It isn't clear how large Clarke's Young Snape role will be in the final version of the film, though.
The Epilogue reshoots were completed over the weekend. It is not clear if the original ending, which was completed months ago, was completely scraped. Or if only portions of it were reshot. The original shoot, which depicts the cast much later in life, took place at the real King's Cross, as it is depicted in the book, while new scenes were filmed at Leavesden Studios in London.