How the Grinch Stole Christmas! (TV special) Seuss cartoon, "Horton Hears a Who"). Both story collections contain selected dialogue and music numbers. The "isolated music tracks" in this edition are taken directly from the television soundtrack and are not the re-recorded tracks from earlier versions. The dialogues are the originals, being voiced by Boris Karloff for "Grinch" and Hans Conried for "Horton." Because Thurl Ravenscroft was not credited in the closing credits of the 1966 television special as singing the song "You're a Mean One, Mr. Grinch", it is sometimes attributed to Boris Karloff. After becoming aware of this oversight, Seuss himself called Ravenscroft and apologized profusely
How the Grinch Stole Christmas! (TV special) were credited at the time. On December 18, 1966, MGM released a soundtrack LP in conjunction with the television special. CD releases include albums produced by Island (1995) and Mercury Records. In the recorded version, Boris Karloff does all voices including Cindy Lou Who. The song "You're a Mean One, Mr. Grinch", which comically describes the level of the Grinch's despicable nature, includes all verses with their original rhyming lyrics and the isolated song tracks have different durations due to being re-recorded. On October 5, 1999, Rhino Entertainment released a new CD soundtrack (which included the soundtrack for another Dr.