Chelsea Handler ''shut down'' following her brother's death.
The 'Chelsea Lately' star was just 10-years-old when her big brother Chet died in a hiking accident aged just 22.
She said: ''He was hiking in the Grand Tetons and he literally fell like 80 feet off a cliff.''
The grief caused her to retreat into her own private world where she focussed her energy on not crying in front of people - a tactic she admits was not ''healthy''.
Appearing on 'The Rosie Show', the 36-year-old comedienne said: ''I was shut down. I was shut down because I didn't want to cry in front of anyone. I had seen my parents cry, I was embarrassed.
''That's very unhealthy and took a long time to get over.''
She also felt unnoticed by the rest of her family in the time following the tragedy, although it ultimately brought them closer.
She said: ''I was used to walking into a room and having everyone pay attention to me and I couldn't get any attention. I was in pain too and I felt like no one was tending my pain.
''I also look back at that as one of the most informing things in my life.''