Another “Teen Mom” star is expecting her second baby. Catelynn Lowell, who memorably gave her child up for adoption as MTV reality cameras chronicled her journey, is pregnant again.

Lowell, 21, took to Twitter to reveal she and longtime boyfriend Tyler Baltierra, who fathered her first child too, were expecting. The pair first appeared on MTV’s “16 and Pregnant” and then on several seasons of the spinoff series “Teen Mom.”

PHOTOS: Teen Mom cast, where are they now?

The couple was previously engaged but they called off their engagement after appearing on VH1’s “Couples Therapy.”

Lowell’s mother April Stotts told Us Weekly her daughter will keep the baby this time around.

The couple is in contact with the family that adopted their first child, daughter Carly.

WATCH: Four4Four: Is Dustin Johnson scandal turning into Tiger Woods II?