LOS ANGELES, Ca., Feb. 20 (TOTI) --

Jennifer Aniston and Angelina Jolie have taken shots at each other over the past four years, but remarkably the two haven't been in the same room even once. That's about to change, with Aniston, Pitt, and Jolie all in the same place on Feb. 21 at the Night Before the Oscars Party in Beverly Hills.

Aniston is ready for the confrontation after 4 long years.

"She has always known this moment would happen, and she's never been more ready to see her nemesis, Angie, in the flesh," an insider told OK!. "She's no longer alone -- she has a hot man in her life, John Mayer, and she plans to bring him as her date to the party."

Aniston has been getting over being dumped by Pitt for Jolie, but it hasn't been easy.

"It's taken time, but she's getting past her insecurities about Brad and Angie and their huge, happy family. Though the meeting is sure to be difficult, Jen knows it has to happen, and now couldn't be better timing."

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