<Ul> <Li> Clifford the Big Red Dog ( voiced by John Ritter ; Tom Eastwood in the British version ) : A giant red Labrador Retriever / Vizsla cross . The depiction of Clifford 's size is inconsistent ; he is often shown as being about 25 feet tall ( 7.6 m ) from paws to head , but can appear far larger . The character is based on the imaginary friend of creator Norman Bridwell 's wife . Clifford is devoted to his owner Emily Elizabeth . He is friendly , shy , lovable , loyal , gentle and helpful but sometimes gets into trouble because of his size , or is tempted into trouble by his friends and those he meets . Despite being the protagonist , he seldom has episodes focusing on him , usually serving as the voice - of - reason for his friend 's adventures . </Li> <Li> Cleo ( voiced by Cree Summer ; Regine Candler in the British version ) : An energetic , selfish , trouble - making purple poodle with a tendency to not tell the truth . Her catchphrase is `` Have I ever steered you wrong ? '' which she inadvertently does immediately after . She is one of Clifford 's best friends . Her owner is Mrs. Diller . </Li> <Li> T - Bone ( voiced by Kel Mitchell ; Benjamin Small in the British version ) : A male yellow and orange bulldog with a large appetite . He is often cowardly , clumsy , and cautious , but does have his moments of bravery . He is one of Clifford 's best friends . T - Bone is in love with Mimi , another dog who visits from time to time . His owner is Sheriff Lewis . <Ul> <Li> T - Bone had a best friend named Hamburger ( voiced by Kel Mitchell 's longtime comedy partner Kenan Thompson ) who moved away before Clifford arrived . </Li> </Ul> </Li> <Li> Mac ( voiced by Cameron Clarke ) : A male blue greyhound with an inflated sense of self - importance , who shifts between aloofness and wanting to be part of Clifford , Cleo , and T - Bone 's circle of friends . Mac competes in dog shows . He can be vain , bossy and selfish . However , he appears to be devoted to his owner Jetta . It is revealed in a few episodes that his name is short for Machiavelli . </Li> </Ul>
<Ul> <Li> Clifford the Big Red Dog ( voiced by John Ritter ; Tom Eastwood in the British version ) : A giant red Labrador Retriever / Vizsla cross . The depiction of Clifford 's size is inconsistent ; he is often shown as being about 25 feet tall ( 7.6 m ) from paws to head , but can appear far larger . The character is based on the imaginary friend of creator Norman Bridwell 's wife . Clifford is devoted to his owner Emily Elizabeth . He is friendly , shy , lovable , loyal , gentle and helpful but sometimes gets into trouble because of his size , or is tempted into trouble by his friends and those he meets . Despite being the protagonist , he seldom has episodes focusing on him , usually serving as the voice - of - reason for his friend 's adventures . </Li> <Li> Cleo ( voiced by Cree Summer ; Regine Candler in the British version ) : An energetic , selfish , trouble - making purple poodle with a tendency to not tell the truth . Her catchphrase is `` Have I ever steered you wrong ? '' which she inadvertently does immediately after . She is one of Clifford 's best friends . Her owner is Mrs. Diller . </Li> <Li> T - Bone ( voiced by Kel Mitchell ; Benjamin Small in the British version ) : A male yellow and orange bulldog with a large appetite . He is often cowardly , clumsy , and cautious , but does have his moments of bravery . He is one of Clifford 's best friends . T - Bone is in love with Mimi , another dog who visits from time to time . His owner is Sheriff Lewis . <Ul> <Li> T - Bone had a best friend named Hamburger ( voiced by Kel Mitchell 's longtime comedy partner Kenan Thompson ) who moved away before Clifford arrived . </Li> </Ul> </Li> <Li> Mac ( voiced by Cameron Clarke ) : A male blue greyhound with an inflated sense of self - importance , who shifts between aloofness and wanting to be part of Clifford , Cleo , and T - Bone 's circle of friends . Mac competes in dog shows . He can be vain , bossy and selfish . However , he appears to be devoted to his owner Jetta . It is revealed in a few episodes that his name is short for Machiavelli . </Li> </Ul>
who is the voice for clifford the big red dog
who is the voice for clifford the big red dog
John Ritter Tom Eastwood
John Ritter Tom Eastwood