Who knew that Jessica Chastain, 31, and Shailene Woodley, 20, would have emerged from last year's awards gauntlet as the bestest of besties? When Woodley arrived as the last celeb at the Calvin Klein Collection party at Cannes this week, a timid publicist stopped an exiting Chastain and asked if she might be willing to come back and take a photo with Woodley. Chastain gasped, turned around, and practically ran into Woodley's arms. "That's my friend!" said Chastain, leaping along the red carpet. Then came the warmest embrace you've ever seen. "My heart just melted," said Woodley. When we asked her how they became friends, she explained that they'd spent a lot of time together as Woodley was promoting The Descendants and Chastain was promoting The Help, The Tree of Life, and Take Shelter. Woodley's eyes welled up with tears at just the thought. "I just ... my heart chakra opens up to a million degrees when I see her. She's a phenomenal human being."