'Teen Mom 2' star Leah Messer Calvert pregnant again

"Teen Mom 2" star Leah Messer Calvert is pregnant again, Us Weekly reports.

"Jeremy and I are excited to be adding a new addition to our family," says the 20-year-old reality star, who has 2-year-old twin daughters, Aliannah and Aleeah, with ex-husband Corey Simms. "Being a teen mom was difficult, but I'm older and in a different place now -- married to Jeremy and excited for our family to grow."

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"Ali and Aleeah can't wait to meet their new brother or sister," adds Leah, whose new baby is due sometime this winter. "We feel incredibly blessed and look forward to this next chapter in our lives."

Leah previously suffered a miscarriage with Calvert, then her fiancé, one of the storylines that will feature prominently on Season 3 of "Teen Mom 2." The couple were married in April 2012.

Season 3 of "Teen Mom 2" premieres Nov. 12 at 10 p.m. on MTV.