Young love can quickly turn into young parenthood, as Teen Mom attests. But young parenthood, with all its stressors, can lead to young heartbreak, as fans of the MTV franchise have seen.

It's no surprise, then, that only a few of the couples from the original series and Teen Mom 2 have managed to keep their romance alive.

Now, cast members from those two series (including actors from the short-lived series Teen Mom 3) are starring in MTV's Teen Mom: The Next Chapter, the second season of which is currently airing on MTV.

If you haven't watched the series, or are curious about the former Teen Mom stars who have closed the book on their reality careers, read on for updates on the original couples. (Teen Mom's Farrah Abraham and Derek Underwood are not pictured, as Underwood died before Teen Mom premiered.)