A beloved member of the Star Trek and Marvel universes has passed away.

On February 25, beloved actor Kenneth Mitchell’s family released a statement confirming Mitchell’s passing. Over the last five years, Kenneth Mitchell lived with and battled ALS.

“With heavy hearts we announce the passing of Kenneth Alexander Mitchell, beloved father, husband, brother, uncle, son and dear friend,” the statement began. “Ken was widely known as an actor in many films and television shows.”

He was just 49 years old.