Sam Clemmett is a British actor.
 Born in Brundall, Norfolk, Clemmett began his acting career in 2013.
 He is known for being cast as Albus Potter in 2015 for the British play Harry Potter and the Cursed Child.
 His performance in the play has made him popular with Harry Potter fans, as well as the creator of Harry Potter, J.K. Rowling.
 Rowling stated that, "There's much I could say about Sam-as-Albus, but we'd be into spoiler territory so quickly I'll just say we couldn't have cast better."
 He played the role in the West End, until late-Spring 2017.
Georgina Leonidas (born 28 February 1990) is an English actress best known for playing Molly in "The Basil Brush Show", and Katie Bell in "Harry Potter and the Half-Blood Prince" and "Harry Potter and the Deathly Hallows – Part 2".
Harper Page Marshall is an English actress.
 She is known for her role as Hermione Granger in the video games of "Harry Potter and the Prisoner of Azkaban", "Harry Potter and the Goblet of Fire" and "Harry Potter and the Order of the Phoenix".
 She also provided the voice for "".
Afshin Zinoori (افشين زی‌نوری) (born April 30, 1976), is an Iranian actor who is known for Persian voice-dubbing foreign films and television programs.
 He was originally born from Tehran.
 He is known for dubbing over Elijah Wood's role as Frodo Baggins from "The Lord of the Rings" film trilogy and has also dubbed over some of Leonardo DiCaprio and Matt Damon's voice roles in films they starred in.
 He has also dubbed over Daniel Radcliffe's role as Harry Potter, from the Harry Potter films 3-5.
Thomas Andrew Felton (born September 22, 1987) is an English actor.
 Felton began appearing in commercials when he was eight years old for companies such as Commercial Union and Barclaycard.
 He made his screen debut in the role of Peagreen Clock in "The Borrowers" (1997) and he portrayed Louis T. Leonowens in "Anna and the King" (1999).
 He rose to prominence for his role as Draco Malfoy in the film adaptions of the best-selling "Harry Potter" fantasy novels by J.K. Rowling.
 His performances in "Harry Potter and the Half-Blood Prince" and "Harry Potter and the Deathly Hallows – Part 1" won him two consecutive MTV Movie Awards for Best Villain in 2010 and 2011.
Bonnie Francesca Wright (born 17 February 1991) is a British actress, film director and model.
 She is best known for playing the role of Ginny Weasley in the "Harry Potter" film series, based on the "Harry Potter" novel series by British author J. K. Rowling.
Sara Bennett is a British visual effects artist.
 Best known for her works in "Harry Potter and the Chamber of Secrets" (2002), "Harry Potter and the Prisoner of Azkaban" (2004), "Harry Potter and the Goblet of Fire" (2005), "Doctor Who" (2005), "Merlin" (2008), "Jonathan Strange & Mr Norrell" (2009), "Skellig" (2009), "The Martian" (2015) and "Ex Machina" (2015).
Who Killed Nelson Nutmeg?
 is a 2015 British independent family film written and directed by Tim Clague and Danny Stack and starring Bonnie Wright.
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.
Daniel Jacob Radcliffe (born 23 July 1989) is an English actor best known for his role as Harry Potter in the film series of the same name.
 He made his acting debut at 10 years of age in BBC One's 1999 television film "David Copperfield", followed by his cinematic debut in 2001's "The Tailor of Panama".
 At age 11, he was cast as Harry Potter in the first "Harry Potter" film, and starred in the series for 10 years until the release of the eighth and final film in 2011.

Question: Who Killed Nelson Nutmeg starred the actress best known for what Harry Potter role?
Answer: Ginny Weasley