Marlon & T.J. Jackson Slam Joseph Fiennes' 'Insulting' Michael Jackson Portrayal: It's a 'Disgusting Mockery'

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The backlash against Joseph Fiennes' portrayal of Michael Jackson -- in the upcoming TV movie, Elizabeth, Michael and Marlon -- continues to grow as several of Michael's family members are speaking out about the casting decision.

A day after the King of Pop's daughter, Paris Jackson, took to Twitter to slam the recently released trailer showing the actor in full prosthetic makeup, T.J. Jackson shared his disdain for the "insulting" portrayal.

WATCH: Paris Jackson Responds to Joseph Fiennes' 'Shameful' Portrayal of Her Late Father Michael Jackson

"My uncle was incredibly proud of his heritage and of who he was," said T.J., son of Michael's brother, Tito Jackson, in a statement released to The Insider on Thursday. "He was proud to be a black man who suffered from the skin disease vitiligo."

"He loved all people as my entire family does. But for a white actor to play my uncle, a black man, is insulting to him, his legacy, his family, his fans and really the entire black community," he continued. "This isn't comedy, it's disgusting mockery with no taste."

WATCH: Joseph Fiennes 'as Shocked as You' to Portray Michael Jackson in New Film

T.J.'s brother, Taj Jackson, also took to Twitter to share his thoughts on the trailer, writing, "Unfortunately this is what my family has to deal with. No words could express the blatant disrespect."

When ET reached out for comment from Michael's brother, Marlon Jackson, the 59-year-old performer said, "Tell me, this is a joke, right?"

WATCH: Michael Jackson Once Told Oprah Winfrey He Didn't Want a White Actor to Portray Him on Screen

The TV movie, which is part of the anthology series Urban Myths: A Brand New Collection of Comedies, created for the U.K.-based TV network Sky Arts, tells the supposedly true story of a road trip taken by Michael, Elizabeth Taylor (played by Stockard Channing) and Marlon Brando (played by Brian Cox) from New York City to Los Angeles in the wake of the Sept. 11 terrorist attacks.

For a look at the controversial trailer, and some of the early blowback it has generated, check out the video below.