<P> Thurl Arthur Ravenscroft ( / ˈθɜːrl ˈreɪvənzkrɒft / ; February 6 , 1914 -- May 22 , 2005 ) was an American voice actor and bass singer known as the booming voice behind Tony the Tiger 's `` They 're grrreat ! '' in Kellogg 's Frosted Flakes television commercials for more than five decades . He was also the uncredited vocalist for the song `` You 're a Mean One , Mr. Grinch '' from the classic Christmas television special , Dr. Seuss ' How the Grinch Stole Christmas ! </P>
<P> Thurl Arthur Ravenscroft ( / ˈθɜːrl ˈreɪvənzkrɒft / ; February 6 , 1914 -- May 22 , 2005 ) was an American voice actor and bass singer known as the booming voice behind Tony the Tiger 's `` They 're grrreat ! '' in Kellogg 's Frosted Flakes television commercials for more than five decades . He was also the uncredited vocalist for the song `` You 're a Mean One , Mr. Grinch '' from the classic Christmas television special , Dr. Seuss ' How the Grinch Stole Christmas ! </P>
who sings the songs in the grinch who stole christmas
who sings the songs in the grinch who stole christmas
Thurl Arthur Ravenscroft
Thurl Arthur Ravenscroft