November 14, 2016 04:09 PM

There’s a new trailer for Natalie Portman’s Jacqueline Kennedy Onassis biopic Jackie, and it offers an extended look into actress’ buzzworthy performance — as well as an emotional reenactment of John F. Kennedy’s assassination.

Portman has already generated critical acclaim for her portrayal of the former first lady, and the latest trailer helps turn up the Oscar buzz surrounding her performance.

“I’ve grown accustomed to a great divide between what people believe and what I know to be real,” Portman says in the trailer. “There should be more horses, more soldiers … more crying, more cameras … I’m not the first lady anymore. I lost Jack somewhere. What was real? What was performance?”

Directed by Chilean filmmaker Pablo Larraín, Jackie follows Kennedy’s period of grief in the aftermath of her husband’s assassination in 1963. As shown in this clip, the film also examines how she worked to carefully craft the Kennedy legacy following his death.

The film also stars Peter Sarsgaard, Billy Crudup, Greta Gerwig, John Hurt and Max Casella as the members of the first lady’s inner circle during this pivotal time.

“[We see] the toughness of who she was, dealing with what she had to go through while keeping herself together for the sake of the country and her family,” Portman previously told PEOPLE. “And also the vulnerability and the intelligence of how she really crafted [JFK’s] legacy.”

Jackie hits theaters Dec. 2.

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