Maggie Gyllenhaal was at a hotel in Boston, while filming a movie there. It was the middle of the night, and, unlike New York, everything seemed to close at night. Needless to say, she was bored. She was looking out the window, when she saw someone in the pool. Was that Marion? Marion Cotillard was also there, filming a completely unrelated movie. "You know what?" she thought, "Think I'll join her." She got into her bathing suit, grabbed her towel, and went downstairs.
Marion swam up to the edge, and put her arms up on it. Suddenly, she heard:
"Hey, mind if I join you?"
Marion looked up. "Oh, Maggie. Um, wasn't expecting anybody else to come out."
Maggie noticed her slightly nervous tone, and then saw Marion's bare shoulders. "Oh, my God!" she laughed, "Are you skinny-dipping?"
Marion pushed away from the edge, to confirm this. "Okay, you caught me."
"Well, jeez," Maggie continued to chuckle, "if I'd known that, I wouldn't have bothered with this." Maggie quickly stripped out of her bathing suit.
"Um, I should probably warn you, the water's really cold."
Unheeding, Maggie dived in, and surfaced in front of her.
"S'okay. I'm Swedish. We're like polar bears."
"Hm, polar bear." Marion snickered. "You probably would be in a club like that, jumping into icy lakes in January."
"And you'd probably rather be in a hot-tub in Ibiza."