Charlize Theron and Sean Penn returned to the red carpet  on Thursday, making a sweet couple's arrival at the premiere of her new movie, A Million Ways to Die in the West, in LA. Over a week after their dashing appearance at the Met Gala , Sean couldn't help but beam as he looked up at Charlize, who stunned in a black Dior dress. The Oscar-winning actress plays a gunslinging beauty in the comedy, which was written, directed, and produced by her costar Seth MacFarlane. Although we're not used to seeing Charlize tackle comedic material, the actress had Seth bending over from laughter when they buddied up before the screening. Meanwhile, Amanda Seyfried  got in on the fun, as Sarah Silverman made a rare appearance with her boyfriend, Michael Sheen. Keep reading to see the group's best premiere moments, and then get the inside scoop about the Western film when you watch our red carpet interviews on POPSUGAR Now on TVGN  this Friday!