People magazine revealed Melissa Rivers' startling transformation, playing her late mother in the film Joy.
The David O. Russell-directed movie stars Jennifer Lawrence, Bradley Cooper and Robert De Niro. In one scene, Melissa plays Joan hosting a QVC special.
Melissa tells the magazine that she "freaked out” during the makeover. "It was bizarre. I stopped looking in a mirror,” she said.
Joan Rivers passed away in September 2014 at age 81 from cerebral hypoxia.