Reese Witherspoon got married on Saturday, but the poor dear's Will the Circle Be Broken was outshined by the first public appearance of Scarlett Johansson and Sean Penn as a couple. It turns out that Scarlett is a client of Reese's now-husband, and Rob Shuter reported that everyone was shocked to see she brought Sean Penn as her plus one. Apparently, their outing was a huge deal, as a source told Rob that their arrival together "is announcing to the whole of Hollywood that they are serious." Previously, Scarlett and Sean were seen celebrating Black Swan (a movie that neither one of them made) by draping their legs over each other at a party in LA and earlier this month, they went to Mexico for one day because it was all they needed. But now that everything's out in the open, they're planning a trip to Haiti, which will certainly serve as another kind an announcement (because that's why anybody does anything, you see -- to make an announcement!).