Born in Glendale, CA; son of Disney Studios producer Louis Debney (1916-1986); educated at CalArts. Debney began working as a composer in television and video games in the early 1980s. His first feature credits were NOT SINCE CASANOVA, THE FURTHER ADVENTURES OF TENNESSEE BUCK and SEVEN HOURS TO JUDGMENT (all 1988). Notable among his extensive credits since then are JETSONS: THE MOVIE (1990), HOCUS POCUS (1993), CUTTHROAT ISLAND (1995), THE RELIC, LIAR LIAR and I KNOW WHAT YOU DID LAST SUMMER (all 1997), I'LL BE HOME FOR CHRISTMAS (1998), MY FAVORITE MARTIAN and END OF DAYS (both 1999), THE REPLACEMENTS and THE EMPEROR'S NEW GROOVE (both 2000), SPY KIDS, CATS & DOGS, SCARY MOVIE 2, THE PRINCESS DIARIES and JIMMY NEUTRON: BOY GENIUS (all 2001), SNOW DOGS, THE SCORPION KING, SPY KIDS 2: ISLAND OF LOST DREAMS, THE TUXEDO and THE HOT CHICK (all 2002), BRUCE ALMIGHTY and ELF (both 2003), WELCOME TO MOOSEPORT, THE PASSION OF THE CHRIST, RAISING HELEN, THE PRINCESS DIARIES 2: ROYAL ENGAGEMENT, CHRISTMAS WITH THE KRANKS and additional music for SPIDER-MAN 2 (all 2004), SIN CITY, THE PACIFIER, DUMA, THE ADVENTURES OF SHARKBOY AND LAVAGIRL 3-D, DREAMER: INSPIRED BY A TRUE STORY, ARTHURA: A SPACE ADVENTURE, CHEAPER BY THE DOZEN 2 and CHICKEN LITTLE (all 2005), KEEPING UP WITH THE STEINS, THE ANT BULLY, BARNYARD, IDLEWILD and EVERYONE'S HERO (all 2006), GEORGIA RULE and EVAN ALMIGHTY (both 2007), MEET DAVE, SWING VOTE, MY BEST FRIEND'S GIRL and MANDRAKE (all scheduled for 2008), OLD DOGS and SIN CITY 3 (both scheduled for 2009), and SIN CITY 2 (announced for 2010). While still in his forties, Debney received ASCAP's prestigious Henry Mancini Lifetime Achievement Award in 2005.  Nominated for Achievement in Music (Score) 2004: THE PASSION OF THE CHRIST 1 nomination