Ginnifer Goodwin is playing Jackie Onassis in "Killing Kennedy," and looks almost identical to the First Lady.
Goodwin, 35, is seen in this photo taken yesterday by the National Geographic Channel. Rob Lowe is playing John F. Kennedy in the film.
Lowe tweeted, "Just saw Ginnifer Goodwin as Jackie Kennedy in the sad and awful blood-stained dress. Extremely emotional."
The docudrama is two hours long and is based on Bill O'Reilly and Martin Dugard's best-selling book. It chronicles the last years of Kennedy and his assassin Lee Harvey Oswald.
Michelle Trachtenberg is playing Marina Oswald Porter, Lee Harvey's wife.
"I am so excited for the challenge to portray Marina Oswald, and to do my first role speaking only in Russian," she said.
"I'm the only actor playing someone who is still alive, so I want to stay as true to her as possible."