Joan Rivers’ death deeply impacted her “Fashion Police” costars. While many celebrities took to Twitter to share their grief over the comedian’s death, Kelly Osbourne and Giuliana Rancic needed much more than 140 characters to give a proper tribute to Rivers.

“I'm completely heartbroken by the loss of my beloved Joan,” Osbourne wrote on Facebook. “Not only was she my boss, she was and will always be my teacher, therapist, closest friend, inspiration and the only grandmother I ever knew. She was family and I will never forget her.”

Rancic also took to Facebook to express her condolences. “It is almost impossible to describe how much I adored Joan and how much she has meant to me. She was not only the funniest women I have ever met but was incredibly loving, honest, and lived her life with no regrets,” she wrote.

“Working with her for the last 13 years has been one of the true joys of my life. She could put a smile on your face, instantly, no matter how hard your day was,” Rancic said. “Until we meet again...May you rest in peace, Joan. I love you.”

“Fashion Police” star George Kotsiopoulos was the first of the crew to issue a statement. “Rest in peace @Joan_Rivers. Thank you for changing my life,” he wrote. “I will miss you so much.” 

[The full statements from Osbourne and Rancic can be seen on their Facebook pages]

Rivers will be laid to rest in New York City, her hometown, on Sunday, Entertainment Weekly reported. Her funeral will be held at Temple Emanu-El. “It is a terribly sad day for all of us,” Emanu-El  Rabbi Joshua M. Davidson told EW Thursday. “We mourn with her family, friends and all those millions to whom she brought laughter and joy.”

Rivers died a week after she underwent a throat procedure at Yorkville Endoscopy in New York City. The clinic is not suspected of foul play, but the New York State Department of Health is investigating the clinic.

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