Jackson Lee / Splash News
This calls for a celebration!
In honor of the actor's 42nd birthday on Saturday, Aniston is planning a massive party with close friends at her newly renovated Bel-Air mansion.
But Theroux's birthday isn't the only major milestone that is cause for celebration…
It turns out that it's also the couple's one-year anniversary of their engagement!
Tthe rumor mill has gone into overdrive with reports that the two were set to walk down the aisle this weekend, but for now all signs point to it being strictly a birthday party.