'Teenage Mutant Ninja Turtles' Star Ernie Reyes Jr. Needs Kidney Transplant

"His battle has gone from the screen to ... fighting for his life," says sister.

Reyes, 43, starred in "Sidekicks" in the 1980s and "Teenage Mutant Ninja Turtles II: The Secret of the Ooze" in 1991, and also had roles in "Rush Hour 2" and "Indiana Jones and the Kingdom of the Crystal Skull."

"My brother has spent his entire childhood and adult life fighting in films and television, but now his battle has gone from the screen to reality, fighting for his life," his sister said on GoFundMe.

She added, "Regardless of where you have seen or heard of Ernie Reyes Jr., he has impacted peoples' lives all over the world through his extraordinary performances in television and film. Please be aware that he needs support during this time of need and recovery of his life."