Phil Robertson, star of "Duck Dynasty," was diagnosed with Alzheimer's in December, and his sons and nephew shared that his condition has gotten worse.

WATCH: ‘DUCK DYNASTY’ STARS NEW MOVIE REVEALS FAMILY’S JOURNEY TO FAITH. Video "He just completely changed once he yielded to the gospel," Willie said. Korie also noted that Miss Kay, ...

As “Duck Dynasty” prepares to return to television for the first time in nearly a decade, the Robertson family continues to deal with heartbreaking health news when it comes to Phil and Kay ...