The passing of Joan Rivers was a shock to practically everyone who laughed along with the legendary comedian, and those from celebrity world were no different.
Creative artists from all over the world took to Twitter to mourn Rivers' death and to express their condolences to her family.
Lena Dunham
Will Smith
Robin Roberts
Kevin Hart
Meredith Vieira
Lindsay Lohan
Cyndi Lauper
James Woods
Dr. Oz
Elizabeth Banks
Sharon Osbourne
Seth Rogen
Bette Midler
Samuel L. Jackson
Jenny McCarthy
Rachel Ray
Joel McHale
Candace Cameron Bure
Larry the Cable Guy
Fran Drescher
Molly Ringwald
Kathie Lee Gifford
Richard Simmons
Duran Duran
Bob Saget
Mandy Moore
Paula Abdul
Leah Remini
Kathy Griffin
Sara Evans