Teen Mom Cast: See Them Before They Were Stars!

Putting together a Teen Mom throwback album feels a bit weird.

So weird, in fact, that featuring their ultrasounds in utero wouldn't be a stretch for the fab four who MTV first introduced us to in 2009.

Since the popular series, which was preceded by 16 & Pregnant, first premiered, a few cast members have had more children.

Maci Bookout and Catelynn Lowell both welcomed new additions in 2015. Jenelle Evans in 2014. Leah Messer has three kids total.

Some have struggled mightily with substance abuse, and at least one infamous "star" enjoys a career in the adult entertainment industry.

Farrah Abraham is in a league of her own, for better or worse.

If you watch Teen Mom online these days, you're watching quasi-celebs in their own right, given the show's surprising staying power.

Yet they were all regular girls at one point, and the authenticity from the olden days still shines through as they progress into adulthood.

With new Teen Mom: OG (original girls, not gangstaz) episodes starting January 4, 2016, let's throw it back to before they were stars ...