Noticias Telemundo broke the news ... "We regret to inform you of his death on Sunday, December 12 at 6:15 a.m."

Fernández was known internationally ... selling north of 65 million albums and starring in more than 35 movies. He was named Person of the Year by the Latin Recording Academy back in 2002. He snagged 3 Grammys and 8 Latin Grammys.

He made his way to the Hollywood Walk of Fame back in 1998.

Fernández battled numerous health issues over the last decade. In 2012, he underwent surgery to remove a cancerous growth on his liver. The following year he suffered from pulmonary thrombosis.

Earlier this year, Fernández was hospitalized after falling at his ranch.