A new list of '24 Celebrity Couples You Never Knew Were a Thing' contains a few you probably knew about, a few you've probably forgotten about . . . and some genuine surprises.
Justin Timberlake and Fergie. This one happened in 1996, when Justin was 16 and Fergie was a COUGARIFFIC 21.
Alexander Skarsgard and Amanda Seyfried. They went on a few casual dates after Amanda broke up with her boyfriend Dominic Cooper in 2010.
Natalie Portman and bald little DJ-guy Moby. They dated briefly in 2001, and Moby later revealed that it made him the subject of, quote, "a lot of nerd wrath", because he was doing Luke Skywalker's mom.
Ryan Gosling and Sandra Bullock. Sandra sunk her claws into Ryan, who's 16 years younger, after they met on the set of the movie "Murder By Numbers". They dated from 2002 to 2003.
David Arquette and Drew Barrymore. They were teenagers when they hooked up in 1991.
Drew went on a date with Christian Bale a few years later, but he says, quote, "We went to see some bloody awful horror film, and that was the end of it. She never called again."
Lance Armstrong and Ashley Olsen. Yes, this actually happened, in 2007.
Cameron Diaz and British pop dork Robbie Williams. This was in 2003, when people kind of knew who Robbie Williams was.
Tobey Maguire and Rashida Jones. They dated from 1997 to 1999, but broke up just before Tobey landed the lead in "Spider-Man".
Ryan Reynolds and Alanis Morissette. You probably remember this one, because it lasted from 2002 to 2007.
Matthew Perry and Heather Graham. They were making the Beast with Two Backs briefly in 2003.
Leonardo DiCaprio and Naomi Campbell. Leo didn't just start nailing supermodels yesterday. He was hitting this in 1995. Naomi also had a thing in the '90s with Robert De Niro . . . who's notorious for his Jungle Fever.
Nick Lachey and Kim Kardashian. Kim got with him in 2006, at the height of his fame after his split from Jessica Simpson. He even came up with the crazy theory that she used him for publicity. Kim dated Nick Cannon that same year.
Jason Schwartzman and Zooey Deschanel. They were interlocking genitalia between 2003 and 2005.
Josh Hutcherson and Vanessa Hudgens. This is another one you probably remember. They hooked up after meeting on the set of "Journey 2: The Mysterious Island". They had already broken up by the time it came out in 2012.
Ashton Kutcher and January Jones. They dated from 1998 to 2001, but Ashton wasn't supportive of January's career. He supposedly told her she wasn't a good enough actress to make it.
Tom Cruise and Cher. Another 16-year age difference. They hooked up in 1987, and Cher later admitted she was, quote, "crazy about him."
Shia LaBeouf and Hilary Duff. They went on ONE date. We don't know when it happened, but in an interview a few years ago, Shia called it, quote, "the worst date either of us has ever had."
Matthew Morrison and Kristen Bell. They dated briefly when they were both students at NYU.
Robert Downey Jr. and Sarah Jessica Parker. You may have forgotten about this one, but these two were a big item in the '80s. But even back then he was dealing with his "issues", and that's what eventually drove them apart.
Anthony Kiedis from the Red Hot Chili Peppers and Heidi Klum. This was pre-Seal, of course. They had a brief fling in 2002.
Meanwhile, Seal was nailing Tyra Banks back in the mid-'90s.
Liam Neeson and Helen Mirren. They met on the set of "Excalibur" in 1980, and Liam was lucky enough to tap that for the next four years.