Because, as it happens, the Hitchcock costar gave Justin Timberlake's new wife quite a warm welcome on the red carpet last night. If you call copping a feel warm.
OK, in all fairness, the handsy encounter is most likely nothing more than an unfortunate angle, and the daring dame is probably just admiring those rather unusual ruffles on her chic black Gucci gown.
Whatever Helen was grabbing for, she seemed to get more than a handful. Whereas innocent bystander and fellow costar Toni Collette got more of an eyeful.
We're sure Justin didn't mind. Too much.