Glee star Lea Michele has written to U.S. officials to call for an end to medical research carried out on chimpanzees.
The animal-loving actress is worried about a group of chimps at a laboratory in Texas and has penned a letter to chiefs at America's National Institute of Health in a bid to save the apes.
She wants the animals returned to the Alamogordo Primate Facility, a sanctuary in New Mexico which houses chimps which have been retired from testing facilities.
Michele writes, "As an animal protection advocate, I implore you to help 14 chimpanzees who were recently moved to a notorious Texas laboratory, where they are being used in harmful experiments.
"These chimpanzees had already been subjected to invasive research for decades before finally getting a break in 2001. They were safe in a facility in New Mexico - until the federal government suddenly decided to put these incredibly intelligent animals back into lab cages.
"Chimpanzee experimentation raises some obvious ethical issues, and there are also clear scientific problems. That's why most countries around the world no longer permit harmful research on chimpanzees.
"I am joining the Physicians Committee for Responsible Medicine in asking you to return these 14 chimpanzees to the Alamogordo Primate Facility, where they will not be used in invasive experiments."