Trivia for
When a Stranger Calls (2006) More at IMDbPro »

• Even though the stranger is played by Scottish-born actor Tommy Flanagan, the voice in the phone-calls is actually Lance Henriksen's. Henriksen fit the voice, whereas Flanagan fit the build of the stranger.
  
  
• In preparation for her role as Jill, Camilla Belle had to do two months of weight training and learning how to run.
  
  
• The voice of "Stacy", the unseen girl during the opening credit sequence, and victim of the killer that targets Jill, is that of director Simon West's 12 year old daughter Lilly.
  
  
• The name of Jill's high school, Fernhill, was the name of director Simon West's high school.
  
  
• Director Simon West opted not to show the crime scene Detective Hines has to see at the beginning of the movie to secure a PG-13 rating.
  
  
• Jill's high school is "Fernhill". Director Simon West went to a "Fernhill High School" in his native Herfordshire, England.
  
  
• When Tiffany (Katie Cassidy) first appears in the movie, she's stirring a jar of red paint while standing next to Scarlet - behind them are several jars of red tinted paints. The name for a woman who is promiscuous or loose is is often referred to as "a scarlet woman", a subtle reference to what Tiffany has done to betray Jill.
  
  
• The front of the Mandrakus house was built at an unused reservoir, while the interior was in a studio.
  
  
• A poster on the wall in the hospital in the final scene reads "No shame, no blame, no names". The stranger's name is never revealed in the movie.
  
  
• Tommy Flanagan sang a Broadway version of his infamous "your blood all over me" line to Camilla Belle in between scenes.
  
  
• There were at least five different versions of the peach/coral colored t-shirt Jill wears throughout the movie; a special "waterproof wet-look" version was made for her to wear through her scenes with water.
  
  
• Director Simon West opted not to show the crime scene Detective Hines has to see at the beginning of the movie to secure a PG-13 rating.
  
  
• Jill's locker at school has a mini-white board on the inside door with the words "That's Hot!" written upon it; she also has Polaroid of Tiffany (Katie Cassidy), who she has been betrayed by.
  
  
• Jill's high school is "Fernhill". Director Simon West went to a "Fernhill High School" in his native Herfordshire, England.
  
  
• When Tiffany (Katie Cassidy) first appears in the movie, she's stirring a jar of red paint while standing next to Scarlet - behind them are several jars of red tinted paints. The name for a woman who is promiscuous or loose is is often referred to as "a scarlet woman", a subtle reference to what Tiffany has done to betray Jill.
  
  

• SPOILER: Tommy Flanagan's menacing scar shown in the scene where he's taken away by the police is real.
  
  
• SPOILER: 'Camila Belle' was told to hit Tommy Flanagan during the scene in the atrium. She missed him and punched the bridge instead, cutting her knuckle and scarring her hand. She also really did slam her head into a glass window during the fight on the stairs.
  
  
• SPOILER: Tommy Flanagan's menacing scar shown in the scene where he's taken away by the police is real.
  
  

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