Horner, who died in a plane crash in 2015, was probably best known for his Academy Award-winning contribution to director James Cameron's cinematic epic, Titanic.
His work covered many different genres ranging from sci-fi (Star Trek II: The Wrath of Khan), action (Patriot Games) and, of course, fact-based drama as is the case with this Ron Howard-helmed film. Utilising huge orchestrations of more sombre pieces to reflect the tension and heroism of a space mission that goes terribly wrong, Horner evoked the sense of danger, claustrophobia and bravery that's felt by both the stranded astronauts and the technicians back at Mission Control trying to bring their crew back down to Earth. From the stirring Main Title through to the splash down, Horner's music is there every step of the way to help tell this incredible story.
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See last year's chart!
Want to see how this year compares to 2012? See what you voted for, and what made it to the top in last year's definitive list of classical movie soundtracks.
The Classic FM Hall Of Fame
Every Easter we compile the world's biggest poll of classical music and count down the top 300 pieces.
Discover film music
From the great composers to their wonderful scores, find out more about the wonderful world of movie music.
Saturday Night at the Movies
Every Saturday, Howard Goodall dedicates two hours to the greatest film scores on Classic FM.