This is a couple of weeks old already, but I still find it fascinating:

A pair of twins who were adopted by separate families as babies got married without knowing they were brother and sister, a peer told the House of Lords.

"They were never told that they were twins," he told the Lords. "They met later in life and felt an inevitable attraction, and the judge had to deal with the consequences of the marriage that they entered into and all the issues of their separation."

Here's the most surprising part: I didn't even know Mark Hamil and Carrie Fisher were dating, nor did I know they were British.

Go figure...