Jennifer Aniston & Justin Theroux: From Telluride to Purgatory

Just after Jennifer Aniston and Justin Theroux went again from 10 times together in Telluride, they got again to the enterprise they really like most: films.

The Wanderlust costars, who have been passionately attached since May, joined Monday's HBO testing of Heaven Missing 3: Purgatory.

The several flanked Jerr Baldwin, manager Joe Berlinger and other acting professional Holiday Flowers for images at L.A.'s Ray Kurtzman Theatre, within the Innovative Designers Organization.

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"They were very lovely and public as always. They're really relaxed with each other," an viewer informs PEOPLE. "Seemed like just another evening on the city."