The Panettiere family has experienced a devastating loss.

Hayden Panettiere's younger sibling Jansen Panettiere passed away at the age of 28.

No cause of death has been publicly disclosed.

Tiger Cruise, Third Watch, Hope & Faith, and Everyone Hates Chris all featured Jansen as an actor.

Jansen made appearances in films and TV shows like walking dead.

Jansen, I only met you a year ago, yet you have been my best friend and biggest admirer, Catherine wrote in a tribute to the artist.

It is truly a tragic loss, and my sympathies are with the Panettiere family.