Big Brother repeatedly urges houseguests and viewers to "expect the unexpected" -- and Big Brother fans have come to expect that will probably include at least one showmance on each season of the CBS reality competition.

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Big Brother's first season premiered on CBS in 2000, and numerous showmances have developed throughout the 18 years the show has been on the air.

While some showmances on Big Brother seemingly came to fruition due to boredom or a desire for attention and affection, many of the couples actually went on to solidify genuine, long-lasting relationships outside of the house.

In fact, several Big Brother couples are engaged or married today -- with children!

There have been so many lovebirds to come and go on Big Brother, so let's take a trip down memory lane and look at some of your favorites. Which showmances worked out and which ones fell apart in the real world?

Was Paulie Calafiore and Zakiyah Everette just a hookup? And what ever happened to other pairs like Daniele Donato and Dominic Briones, and Jessica Hughbanks and Eric Stein?

Love them or hate them, Reality TV World will also update you on what's going on with more recent couples like Raven Walton and Matthew ClinesJessica Graf and Cody Nickson, and Elena Davies and Mark Jansen nowadays.

And there's a lot more where that came from: Nicole Franzel and Corey Brooks, Jeff Schroeder and Jordan Lloyd, Austin Matelson and Liz Nolan, Shelli Poole and Clay Honeycutt, and many more!

Click the BEGIN GALLERY link below to see some of the most memorable showmances in Big Brother history and find out whether they are still together or broken up!!

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