The 33-year-old actress shared screen space with Ruffalo, 47, in 'Foxcatcher' and Cooper, 40, in 'American Snipper'.
"He's a big hugger and you feel so good. Like a bear, man. And he gives a lot of love," she said about Ruffalo.
The blonde actress said Cooper, a nominee for a Best Actor Oscar, is also a big fan of embracing. When asked if he hugs, she replied: "Yeah, big time.