Guess who! Ryan Gosling was super-excited to run into co-star Christina Hendricks at the Los Angeles Film Festival premiere of Drive in Hollywood. "It doesn't feel very different," Hendricks mused when reporters asked about the transition from Mad Men to movie-making. "You show up and do the exact same thing, just with a different group of people." Click through to see Katie Holmes, Khloe Kardashian, Angelina Jolie and more stars at last night’s hottest parties!