On the Voyager two-part time travel episode "Future's End", this woman played a Griffith Park Observatory astronomer who happens to detect the title starship in orbit around 1996 Earth. This actress recently received praise for her turn in the drama I Smile Back. This woman voiced Vanellope von Schweetz opposite John C Reilly's title character in Wreck-It Ralph. Identify this stand-up comic and actress, a former girlfriend of Jimmy Kimmel.
Sarah Silverman