McAdams, 35, and Gyllenhaal, 33, are filming Southpaw in Pittsburgh, Pennsylvania and were snapped breaking bread together at a local eatery called Meat And Potatoes (love it).
McAdams' dating history includes Michael Sheen and long term romance with her The Notebook co-star Ryan Gosling, and she's now dating Patrick Sambrook, a balding music manager with seemingly little in common with her handsome exes. Meanwhile, Gyllenhaal's high-profile relationships include Kirsten Dunst, Reese Witherspoon, Taylor Swift, Alyssa Miller and a rumored dalliance with Natalie Portman.
Still, don't expect to hear too many more stories of McAdams and Gyllenhaal doing anything but downing cows and carbs together: A source dished to E! Online that the pair are just platonic pals and co-stars. But hey, we can dream, right?