Jennifer Aniston and Justin Theroux seem to have a happy marriage — but a new report claims that they cannot stop fighting over the Friends star's ex-husband, Brad Pitt!

Jen, 47, has allegedly been in contact with the World War Z star, 52, since he split from his wife, Angelina Jolie, back in September.

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“Justin and Jen have been at each others’ throats ever since he found out about Brad. He feels totally betrayed, but Jen has told him Brad just needs a sympathetic ear and that she accepted his calls because she wanted to be supportive,” a source tells Star.

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The publication also adds that Justin posted that now-infamous "f–k Brad Pitt" photo to Instagram last week because of this incident.

Jen and Brad were married from 2000 to 2005 and he was rumored to cheat on her with Angie, 41, on the set of Mr. & Mrs. Smith. She found love again with Justin after meeting on the set of Wanderlust and they tied the knot last summer.