Leah Remini is mourning the loss of her beloved friend and colleague. Following the death of Mike Rinder on Sunday at age 69, the actress, 54, paid homage to the late star on social media.

Leah Remini has broken her silence around the death of Mike Rinder, a Scientology whistleblower who earned an Emmy for exposing the secret organization, and recently died. The actress called Rinder her “trusted partner” in Scientology, to whom she turned when she herself left the secretive group in 2013.

I haven’t come to terms with the reality that I can’t call him and hear his voice anymore," the actress wrote in honor of her late friend