It's all AU.

He'd meant to just step outside for some air. It had been an eventful day, though in his experience, weddings usually ended up being pretty dramatic, even without alien intervention. This one, though...Jack shook his head, and chuckled, looking up at the night sky. Rhys had a lot to cope with, and yeah, he was probably good enough for Gwen. If he kept trying hard.

Taking a sip from his champagne glass, he turned to head back into the building, intending to go back to the function room and supervise the clear-up operation.

Only the building he went back into wasn't the one he'd just left. He looked around, recognized New New (he'd not quite identified how many times) New York through the window, shrugged, and lifted his glass in the direction of the back of the nearest (familiar-looking) person. "Here's to you."