Bob Weir, a founding member of the legendary rock band the Grateful Dead, has died at the age of 78, his family announced Saturday.
“It is with profound sadness that we share the passing of Bobby Weir,” his family wrote in a post to his Instagram page. “He transitioned peacefully, surrounded by loved ones, after courageously beating cancer as only Bobby could. Unfortunately, he succumbed to underlying lung issues.”
Matt Winkelmeyer/Getty Images 
This is a breaking story and will be updated.