Jennifer Aniston at Lake Bell's Wedding | Pictures

Lake Bell married artist Scott Campbell in New Orleans on Saturday, and a ton of her celebrity friends were in attendance. Jennifer Aniston was decked out in a short, summery dress alongside her own fiancé, Justin Theroux. Justin, who is good friends with Scott, appeared to be part of the wedding party and, at one point, was in charge of tending to the couple's dogs. Lance Armstrong is close with Scott as well and tweeted his excitement about the nuptials before heading to the big event. Cameron Diaz looked like she had some official duties to help out her friend and What Happens in Vegas costar Lake. Kate Bosworth, who also worked with Lake in Black Rock, had her man, Michael Polish, as her date. Who else was in attendance? Marc Jacobs, Eva Longoria, Josh Hartnett, and Alicia Silverstone, to name a few.

Lake wore a custom Marchesa Couture gown, and Scott was in Marc Jacobs. Lake and Scott met on the set of How to Make It in America in 2011 and got engaged in 2012. Click through to see all the stars at Lake and Scott's wedding — congrats to the happy couple!