Question: Michelle Trachtenberg appeared in the 1996 film that was an adaptation of the 1964 novel by whom?

Context paragraphs:
The Dive from Clausen's Pier: The Dive From Clausen's Pier is a 2005 Lifetime original film based on an Ann Packer novel directed by Harry Winer and starring Will Estes, Michelle Trachtenberg, and Sean Maher.  It premiered on July 25, 2005 on Lifetime.

Harriet the Spy (film): Harriet the Spy is a 1996 American family comedy-drama film based on the 1964 novel of the same name by Louise Fitzhugh.  The film stars Michelle Trachtenberg in her film debut, and is the directorial debut of Bronwen Hughes.  Produced by Paramount Pictures, Nickelodeon Movies and Rastar, it was the first film produced under the Nickelodeon Movies banner and the first of two film adaptations of the "Harriet the Spy" books.  In theaters, the pilot episode of "Hey Arnold! " called Arnold!  was shown before the film.

Michelle Trachtenberg: Michelle Christine Trachtenberg (born October 11, 1985) is an American actress.  She is known for portraying Nona F. Mecklenberg in "The Adventures of Pete & Pete" (1994–96), Dawn Summers in "Buffy the Vampire Slayer" (2000–03), Celeste in "Six Feet Under" (2004), and Georgina Sparks in "Gossip Girl" (2008–12).  She has also appeared in films such as "Harriet the Spy" (1996), "Inspector Gadget" (1999), "EuroTrip" (2004), "Ice Princess" (2005), "Black Christmas" (2006), "17 Again" (2009), "Cop Out" (2010), "Weeds" (2011), and "Killing Kennedy" (2013).

Georgina Sparks: Georgina Sparks is a fictional character in the "Gossip Girl" novel series and a recurring character on the television series of the same name, in which she is portrayed by Michelle Trachtenberg.  While the novel series portrays her as a harmless, friendly drug-addicted young girl, the television adaption portrays her as a cruel, manipulative young socialite who creates havoc throughout the show.  Originally conceived as the series' primary antagonist, by the final season Georgina came into the good graces of the Upper East Side - even becoming a member of their inner circle.  She is notable for her manipulative machinations and sudden returns throughout the series, and for appearing in all the finales, and most recently the latter half of the fifth season in light of cast members Taylor Momsen and Jessica Szohr departing.  In the sixth and final season of the show, she appears in 8 of 10 episodes.

Lauren Wilson: Lauren Wilson (born April 19, 1987 in Oakville, Ontario) is a Canadian figure skater.  She is the 2002 Canadian junior national champion.  She trained under Michelle Leigh and Doug Leigh.  She placed 8th at the 2002 World Junior Figure Skating Championships.  Wilson was one of Michelle Trachtenberg's ice skating doubles in the 2005 Disney movie Ice Princess.

Dawn Summers: Dawn Summers is a fictional character created by Joss Whedon and introduced by Marti Noxon and David Fury on the television series "Buffy the Vampire Slayer", portrayed by Michelle Trachtenberg.  She made her debut in the premiere episode of the show's fifth season and subsequently appeared in every episode of its remaining three seasons.  Within the series, Dawn is the little sister of main character Buffy Summers (Sarah Michelle Gellar), a girl chosen by fate to be a vampire Slayer.  Whedon introduced Dawn to the series because he wanted to introduce a character with whom Buffy could have an intensely emotional non-romantic relationship.

Tim Fywell: Tim Fywell (born 3 October 1951 in Fulham, London, England) is a well respected English, television and film director.  In 2003 he made his first feature debut with "I Capture the Castle", an adaptation of the novel of the same title by Dodie Smith.  Fywell directed his first Hollywood feature, "Ice Princess" starring Michelle Trachtenberg, in 2005.  Fywell started his career in British television, directing episodes of "Brookside".  Fywell recently directed the award winning "Happy Valley" 2 episodes (2014).

EuroTrip: EuroTrip is a 2004 American teen comedy adventure film written by Alec Berg, David Mandel, and Jeff Schaffer, and directed by Schaffer.  The film stars Scott Mechlowicz, Jacob Pitts, Michelle Trachtenberg, Travis Wester, and Jessica Boehrs.  Mechlowicz portrays Scott "Scotty" Thomas, an American teenager who travels across Europe in search of his German pen pal, Mieke (Boehrs).  Accompanied by his friend Cooper (Pitts) and siblings Jenny and Jamie (Trachtenberg and Wester), Scott's quest takes him to London, Paris, Amsterdam, Bratislava, Berlin, and Rome, encountering awkward and embarrassing situations along the way.  The film received a 2004 Teen Choice Award nomination for "Choice Movie Your Parents Didn't Want You to See".

Harriet the Spy: Blog Wars: Harriet the Spy: Blog Wars is a 2010 Canadian/American television film starring Jennifer Stone that premiered on March 19, 2010 on Movie Central and The Movie Network in Canada, and on March 26, 2010, on Disney Channel in the Unites States.  It is an adaptation of the book "Harriet the Spy", by Louise Fitzhugh, the second after the 1996 "Harriet the Spy" film that starred Michelle Trachtenberg as Harriet.  The film was produced by 9 Story Entertainment.  Vanessa Morgan, who starred as Marion in the movie, went on to star in "My Babysitter's a Vampire" and its subsequent television series, which also aired on Disney Channel.

The Scribbler (film): The Scribbler is a 2014 American thriller film directed by John Suits and written by Daniel Schaffer, based on his own graphic novel of same name.  The film stars Katie Cassidy, Garret Dillahunt, Eliza Dushku, Kunal Nayyar, Michelle Trachtenberg and Sasha Grey.

Supporting paragraphs: Michelle Trachtenberg Harriet the Spy (film)
Answer: Louise Fitzhugh