Question: Who produced the eighth and final instalment in the 'Harry Potter' film series written by Steve Kloves and which starred the stage actress Helena Barlow as Rose Weasley?
Context: Harry Potter and the Philosopher's Stone (released in some countries as Harry Potter and the Sorcerer's Stone) is a 2001 British-American fantasy film directed by Chris Columbus and distributed by Warner Bros.  Pictures.  It is based on the novel of the same name by J. K. Rowling.  The film is the first instalment in the long-running "Harry Potter" film series, and was written by Steve Kloves and produced by David Heyman.  Its story follows Harry Potter's first year at Hogwarts School of Witchcraft and Wizardry as he discovers that he is a famous wizard and begins his education.  The film stars Daniel Radcliffe as Harry Potter, with Rupert Grint as Ron Weasley, and Emma Watson as Hermione Granger. Harry Potter and the Chamber of Secrets is a 2002 British-American fantasy film directed by Chris Columbus and distributed by Warner Bros.  Pictures.  It is based on the novel of the same name by J. K. Rowling.  The film is the second instalment in the long-running "Harry Potter" film series.  It was written by Steve Kloves and produced by David Heyman.  Its story follows Harry Potter's second year at Hogwarts School of Witchcraft and Wizardry as the Heir of Salazar Slytherin opens the Chamber of Secrets, unleashing a monster that petrifies the school's denizens.  The film stars Daniel Radcliffe as Harry Potter, with Rupert Grint as Ron Weasley, and Emma Watson as Hermione Granger.  The film is also the last film to feature Richard Harris as Professor Albus Dumbledore, due to his death that same year. Harry Potter and the Prisoner of Azkaban is a 2004 British-American fantasy film directed by Alfonso Cuarón and distributed by Warner Bros.  Pictures.  It is based on the novel of the same name by J. K. Rowling.  The film, which is the third instalment in the "Harry Potter" film series, was written by Steve Kloves and produced by Chris Columbus (director of the first two instalments), David Heyman, and Mark Radcliffe.  The story follows Harry Potter's third year at Hogwarts as he is informed that a prisoner named Sirius Black has escaped from Azkaban intending to kill him. Harry Potter and the Goblet of Fire is a 2005 British-American fantasy film directed by Mike Newell and distributed by Warner Bros.  Pictures.  It is based on the novel of the same name by J. K. Rowling.  The film, which is the fourth instalment in the "Harry Potter" film series, was written by Steve Kloves and produced by David Heyman.  The story follows Harry Potter's fourth year at Hogwarts as he is chosen by the Goblet of Fire to compete in the Triwizard Tournament. Harry Potter and the Deathly Hallows – Part 2 is a 2011 British-American fantasy film directed by David Yates and distributed by Warner Bros.  Pictures.  It is the second of two cinematic parts based on the novel of the same name by J. K. Rowling.  The film, which is the eighth and final instalment in the "Harry Potter" film series, was written by Steve Kloves and produced by David Heyman, David Barron, and Rowling.  It is the sequel to "Harry Potter and the Deathly Hallows – Part 1".  The story continues to follow Harry Potter's quest to find and destroy Lord Voldemort's Horcruxes in order to stop him once and for all. Harry Potter and the Half-Blood Prince is a 2009 British-American fantasy film directed by David Yates and distributed by Warner Bros.  Pictures.  It is based on the novel of the same name by J. K. Rowling.  The film, which is the sixth instalment in the "Harry Potter" film series, was written by Steve Kloves and produced by David Heyman and David Barron.  The story follows Harry Potter's sixth year at Hogwarts as he receives a mysterious textbook, falls in love, and attempts to retrieve a memory that holds the key to Lord Voldemort's downfall. Harry Potter and the Order of the Phoenix is a 2007 British-American fantasy film directed by David Yates and distributed by Warner Bros.  Pictures.  It is based on the novel of the same name by J. K. Rowling.  The film, which is the fifth instalment in the "Harry Potter" film series, was written by Michael Goldenberg (making this the only film in the series not to be scripted by Steve Kloves) and produced by David Heyman and David Barron.  The story follows Harry Potter's fifth year at Hogwarts as the Ministry of Magic is in denial of Lord Voldemort's return. Harry Potter and the Deathly Hallows – Part 1 is a 2010 British-American fantasy film directed by David Yates and distributed by Warner Bros.  Pictures.  It is the first of two cinematic parts based on the novel of the same name by J. K. Rowling and features an ensemble cast.  The film, which is the seventh and penultimate installment in the "Harry Potter" film series, was written by Steve Kloves and produced by David Heyman, David Barron, and Rowling. Helena Barlow (born 5 September 1998) is a former English child film and stage actress best known for her role as Rose Weasley in "Harry Potter and the Deathly Hallows – Part 2".  In 2012, she starred as young Estella in Mike Newell's "Great Expectations" alongside Helena Bonham Carter and Ralph Fiennes. The British film industry produced over four hundred feature films in 2011.  This article fully lists all non-pornographic films, including short films, that had a release date in that year and which were at least partly made by the United Kingdom.  It does not include films first released in previous years that had release dates in 2011.  <br> Also included is an overview of the major events in British film, including film festivals and awards ceremonies, as well as lists of those films that have been particularly well received, both critically and financially.  The year was particularly notable for the release of "Harry Potter and the Deathly Hallows: Part II", the final instalment in the "Harry Potter" film franchise.
Answer: David Heyman