Jen & Justin Bickering Over Bucks

15 months after split.

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Fed-up Jennifer Aniston is currently locked in a bitter cash war with ex-hubby Justin Theroux — just like her current squeeze, Brad Pitt, and his ex-wife Angelina Jolie!

Now, more than a year since the split Justin, 47, describes as “painless” and “heartbreaking,” the actor and the 50-year-old Friends queen are setting up meetings for a financial showdown, sources say.

“They had a lot of money tied to shared business projects, including putting wads of cash aside to create films through her production company,” says an insider.