The son of famed 1970s stuntman Evel Knievel is suing Disney and Pixar over the daredevil character Duke Caboom who features in Toy Story 4.

Axar.az reports that, Kelly Knievel has accused the movie giants of financially gaining from a character they had based on his father without seeking permission.

"Evel Knievel did not thrill millions, break his bones and spill his blood just so Disney could make a bunch of money," he said.

Disney denies the allegations.

A spokesperson for Walt Disney Co said the company would defend itself vigorously against what it called the meritless claims, the Associated Press reports.

Montana-born Evel Knievel - real name Robert Craig Knievel Jnr - was renowned for his breath-taking motorbike stunts during the 1960s and 1970s.