Rachel McAdams may be reuniting with her “Wedding Crashers” co-star Bradley Cooper, as the thesp is in early talks to join the cast of helmer-scribe Cameron Crowe’s untitled pic at Sony.

Cooper and Emma Stone are currently on board to star with Scott Rudin  producing.

Deadline Hollywood broke the news. Plot details are being kept under wraps except that McAdams would play Cooper’s ex-lover.

Production is set to start this fall.

Project would mark the second time that Cooper and McAdams play partners in a dysfunctional relationship; Cooper played McAdams’ disgruntled boyfriend in 2005’s “Wedding Crashers.”

The UTA and Magnolia Entertainment-repped McAdams can be seen next in Universal’s “About Time.”