[Hilary Duff and boyfriend Mike Comrie. All photos by Michael Loccisano for Getty Images] What better place for Hilary Duff to have a screening of her new movie (and show off her latest boyfriend) then the Tribeca Film Festival? Stay Cool, a comedy with a noteworthy cast (besides the Duffster, the big names include Chevy Chase, Winona Ryder, Sean Astin and even Josh Holloway) is getting thumbs up so far.  The Polish brothers (Mark writes and acts, Michael directs) are the creative force behind the project, and were center stage at the film festival (and the after party at Tenjune). And while Winona and Sawyer... er, we mean Josh, couldn't make it last night, we're sure Hilary didn't have a problem celebrating; Boyfriend Mike Comrie, NHL player, was right by her side.

Michael Polish, Rudy Ruettiger, Hilary Duff, Chevy Chase, Mark Polish

Hilary Duff, Michael Polish, Mark Polish

Chevy Chase, Rudy Ruettiger

Rudy Ruettiger, Hilary Duff, Michael Polish, Chevy Chase, Mark Polish

Dominica Scorcese, Hilary Duff