The ridiculously good-looking duo was spotted shooting a scene together for the as-yet-untitled Cameron Crowe movie on the beach in Oahu, Hawaii, on Wednesday, Nov. 6.
And Cooper looked to be both an officer and a gentleman as he affectionately strolled with McAdams.
The film follows a military contractor trying to reconnect with a former lover. Of course, from what we see here, it appears as if he's off to a good start.
The flick is a celluloid reunion for the two celebs, who costarred in the 2005 comedy Wedding Crashers.
No release date has been announced.