The stars of 50/50 gathered at NYC's Ziegfeld Theater last night in order to toast their East Coast premiere. Seth Rogen and Joseph Gordon-Levitt posed for photos with Anna Kendrick, who wore a side-swept updo, ahead of the screening, and then reconvened afterward for a bash at the Four Seasons restaurant. It's a big month for Seth, who's rumored to be tying the knot with longtime girlfriend Lauren Miller in the coming weeks. Lauren was on hand for his latest big evening, decked out in a pink plaid dress. Joe was apparently early for the whole affair and tweeted from his car beforehand. He wrote, "Not allowed to be early to a premiere. So yeah, sitting in a parked car." His good humor was also in evidence during the film's junket up in Toronto. We caught a few minutes with the actor, and Joseph dished about The Dark Knight Rises, music, and more.