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Kenneth Mars (April 4, 1935 – February 12, 2011) was an American actor. He appeared in two Mel Brooks films: as the deranged Nazi playwright Franz Liebkind in The Producers (1967) and Police Inspector Hans Wilhelm Friedrich Kemp in Young Frankenstein (1974). He also appeared in Peter Bogdanovich's What's Up Doc? (1972), and Woody Allen's Radio Days (1987), and Shadows and Fog (1991). Mars appeared in two seasons of Malcolm in the Middle as Otto Mannkusser, Francis's well-meaning but dimwitted boss and a German immigrant who owns a dude ranch. He voiced King Triton, Ariel's father, in the 1989 Disney animated film The Little Mermaid and its sequel, as well as its companion television series, and the Kingdom Hearts series. He also did several other animated voice-over film roles such as Littlefoot's grandfather in the Land Before Time series (up to 2008) and that of Professor Screweyes in We're Back! A Dinosaur's Story (1993), and King Colbert (Prince Cornelius's father) in Thumbelina (1994). Description above from the Wikipedia article Kenneth Mars, licensed under CC-BY-SA, full list of contributors on Wikipedia.

The Little Mermaid Live!
as King Triton (archive footage) (voice)

The Last Laugh
as Self (archive footage) (uncredited)

The Land Before Time
as Grandpa Longneck (voice)

Hannah Montana
as Gunther

The Land Before Time XII: The Great Day of the Flyers
as Grandpa / Parasaurlophus (voice)

The Land Before Time: 2 DinoRiffic Adventures
as Grandpa Longneck

Disney Heroes Volume 1
as Old Gorilla (voice)

The Land Before Time XI: Invasion of the Tinysauruses
as Grandpa (voice)

The Land Before Time X: The Great Longneck Migration
as Grandpa (voice)

Oliver Beene
as Carl the Super

The Land Before Time IX: Journey to Big Water
as Grandpa (voice)

The Making of 'The Producers'
as Self

Good Morning, Miami
as Marty

The Land Before Time VIII: The Big Freeze
as Grandpa / Lambeosaurus (voice)

The Legend of Tarzan
as Old Gorilla (voice)

Teddy Bears' Picnic
as Gene Molinari

The Land Before Time VII: The Stone of Cold Fire
as Grandpa (voice)

How to Marry a Billionaire: A Christmas Tale
as Buzz

Runaway Virus
as Dr. Arnold Bowman

The Little Mermaid II: Return to the Sea
as King Triton (voice)

Malcolm in the Middle
as Otto Mannkusser

The Land Before Time VI: The Secret of Saurus Rock
as Grandpa (voice)

Becker
as Melvin

L.A. Doctors
as Bill

Will & Grace
as Uncle Sid

Godzilla: The Series

You Wish
as Santa Clause

Cow and Chicken
as Candy Store Geek / Policeman (voice)

The Land Before Time V: The Mysterious Island
as Grandpa (voice)

Bruno the Kid: The Animated Movie
as Professor Von Trapp (voice) (archive footage)

The Angry Beavers

Just Shoot Me!
as Horst

Citizen Ruth
as Dr. Charlie Rollins

The Land Before Time IV: Journey Through the Mists
as Grandpa (voice)

Bruno the Kid

The Pretender
as Benny

The Real Adventures of Jonny Quest

Arli$$
as Coach Duffy

Nash Bridges
as Ronald Bishop

Boston Common
as Clown

Making Frankensense of Young Frankenstein
as Inspector Kemp (archive footage)

The Drew Carey Show
as Mr. Tinsley

The Naked Truth
as Judge

Freakazoid!
as Dr. Gunther Hunterhanker (voice)

Rough Magic
as Magician

The Land Before Time III: The Time of the Great Giving
as Grandpa (voice)

The Land Before Time II: The Great Valley Adventure
as Grandpa (voice)

Party of Five
as Earl Garraty

Thumbelina
as King Colbert (voice)

Duckman
as Native American (voice)

Weird Science

We're Back! A Dinosaur's Story
as Professor Screweyes (voice)

Diagnosis: Murder
as Wallace Carstairs

Animaniacs
as Beethoven (voice)

Lois & Clark: The New Adventures of Superman
as Grant Gendell

Sex, Shock & Censorship in the 90's
as Reverend Pete

Mighty Max

Star Trek: Deep Space Nine
as Colyus

Hangin' with Mr. Cooper
as Mr. Hucklebuck

Fievel's American Tails
as Sweet William (voice)