Wellbore fluids comprising an expanded and ground perlite and methods of using the same are disclosed. In one embodiment, the methods include a method of cementing comprising preparing or placing a cement composition comprising cement, water, and an expanded and ground perlite. The method further comprises allowing the cement composition to set. A method of servicing a wellbore, comprising providing a wellbore fluid comprising a base fluid and an expanded and ground perlite, placing the wellbore fluid into an annulus in the wellbore, placing a cement composition into the annulus, and allowing the cement composition to set.