Question: Which 2008 Swedish Romantic horror film featured a Swedish actress best known for her work in children's television shows?

Context articles: Matt Reeves
Ann Zacharias
The 7th Hunt
Let Me In (film)
Anita Ekström
Let the Right One In (film)
Annalisa Ericson
Lina Leandersson
Lis Nilheim
Ika Nord

Matthew George "Matt" Reeves (born April 27, 1966) is an American screenwriter, director and producer.
 Reeves began his career as a screenwriter for the films "" (1995) and "The Pallbearer" (1996), the latter of which marked his feature-length directorial debut.
 He then transitioned into television as a director and co-creator of the drama series "Felicity" (1998–2002) alongside J.J. Abrams.
 Reeves has since directed the found-footage horror film "Cloverfield" (2008), the romantic horror film "Let Me In" (2010), and the science fiction sequels "Dawn of the Planet of the Apes" (2014) and "War for the Planet of the Apes" (2017).
 In February 2017, Warner Bros. announced that Reeves would direct "The Batman", to be set in the DC Extended Universe starring Ben Affleck as the titular character.
Ann Zacharias (born 19 September 1956) is a Swedish actress.
 She appeared in fifteen films and television shows between 1971 and 1988.
 She is the mother of Swedish actress Sascha Zacharias.
The 7th Hunt is an independent horror film from Australia, directed by J.D. Cohen, co-directed by Darren K Hawkins for Cinegear Productions/Coherent Productions in 2008 and first screened in 2009.
 It is widely considered to be of the Ozploitation (Australian Exploitation) genre.
 The plot revolves around a group of sadistic killers and their victims.
 The film featured in the New York City Horror Film Festival in 2009, the Grimm Up North Film Festival in the UK, and the Atlanta Horror Film Festival.
 The film stars actress and swimsuit model Imogen Bailey of Neighbours fame.
Let Me In is a 2010 American-British romantic horror film written and directed by Matt Reeves and starring Kodi Smit-McPhee, Chloë Grace Moretz, Elias Koteas, and Richard Jenkins.
 It is a remake of the 2008 Swedish film "Let the Right One In" (2008).
 It tells the story of a bullied 12-year-old boy who develops a friendship with a female child vampire in Los Alamos, New Mexico in the early 1980s.
Gertrud Anita Ekström (born 13 January 1943) is a Swedish actress.
 At the 7th Guldbagge Awards she won the award for Best Actress for her role in "Jänken".
 She has appeared in more than 30 films and television shows since 1969.
Let the Right One In (Swedish: "Låt den rätte komma in" ) is a 2008 Swedish romantic horror film directed by Tomas Alfredson, based on the 2004 novel of the same title by John Ajvide Lindqvist, who also wrote the screenplay.
 The film tells the story of a bullied 12-year-old boy who develops a friendship with a vampire child in Blackeberg, a suburb of Stockholm, in the early 1980s.
 Alfredson, unconcerned with the horror and vampire conventions, decided to tone down many elements of the novel and focus primarily on the relationship between the two main characters.
 Selecting the lead actors involved a year-long process with open castings held all over Sweden.
 In the end, the 11-year-olds Kåre Hedebrant and Lina Leandersson were chosen for the leading roles.
 They were subsequently commended by both Alfredson and film reviewers for their performances.
Annalisa Ericson (14 September 1913 – 21 April 2011) was a Swedish actress best known for her roles in 58 Swedish movies between 1930 and 1991.
Lina Leandersson (born 27 September 1995) is a Swedish actress.
 She played the lead role of Eli in the 2008 Swedish romantic vampire film "Let the Right One In", based on the novel by the same name.
 Born in Falun, Leandersson started performing at an early age.
 She acted in local amateur theatre performances, and had a few brief television appearances in 2006.
 At the age of eleven, Leandersson was cast to play one of the two leads in Tomas Alfredson's film, "Let the Right One In", after applying for the role through a web-based casting service.
 The film was an international success, and Leandersson's performance as the vampire Eli brought her widespread critical acclaim as well as several awards and nominations.
 She has stated that she wants to continue acting.
Karen Lis Nilheim (born 5 June 1944) is a Swedish actress.
 She won the award for Best Actress at the 11th Guldbagge Awards for her role in "Maria".
 She has appeared in more than 45 films and television shows since 1964.
Ulrika Christina Elisabeth Nord, stage name Ika Nord (born 29 April 1960 in Halmstad) is a Swedish actress and mime.
 In Sweden, she is best known for her work in children's television shows.
 Internationally, Nord is best known for her role in "Let the Right One In".