Louis A Raynor / MTV
The cast of "Teen Mom" from left, Farrah Abraham, Catelynn Lowell, Maci Bookout and Amber Portwood.
The original "Teen Moms" are getting ready to say goodbye.
"Season 4 will be the final season of 'Teen Mom' with Maci, Catelynn, Amber and Farrah," MTV tells Us Weekly in an exclusive statement. "They will continue to be a part of our MTV family, and we're thankful to these brave young women for sharing their stories and helping to make a positive impact on teen pregnancy prevention."
Maci Bookout, Amber Portwood, Farrah Abraham and Catelynn Lowell all starred in the first season of MTV's "16 and Pregnant" back in 2009, and moved on to appear in the first cast of the groundbreaking, popular reality docudrama about the struggles and triumphs of young, unwed mothers.
As teen birth rates in the U.S. continue to drop, Bookout, Portwood, Abraham and Lowell have all lent their time to speak about teen pregnancy, MTV notes. "From appearing in a series of teen pregnancy prevention PSAs to speaking at high schools around the country, these young women have become advocates for this issue."
The premiere date of "Teen Mom's" fourth and final season has not yet been announced, but is expected to air in summer 2012.
In the meantime, season four of "16 and Pregnant" premieres Tuesday March 27 -- with four of those young women later starring in "Teen Mom 3." (The status of "Teen Mom 2" has not yet been announced.)
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