Did Jennifer Aniston pull a Brad Pitt?!

The actress, who met her new beau Justin Theroux on the set of Wanderlust and has been dating the bearded actor for about a month, may have busted up his long-term relationship with costume designer Heidi Bivens.

Bivens and Theroux, 39, dated for 14 years and had been living together for many of those years. But Theroux gave Bivens her walking papers and asked her to pack up and leave his $1.5-million Washington Square Park apartment last week.

In fact, X17online can report exclusively, Aniston was set to visit the actor in the Big Apple mid-week last week but the Friends star postponed her trip because Bivens was still in the apartment. A source tells us Jen was supposed to stay with Theroux, since her newly-purchases West Village pad isn't ready yet (she's remodeling). But we have to wonder whether a woman who has a Beverly Hills mansion up for $42 million would stay in a one-bedroom coop (check out the gallery below) just a block away from NYU ... but hey, maybe she's downsizing!