LeAnn Rimes and Eddie Cibrian are engaged--and, she's gonna be a stepmom!

Rimes tweeted Monday afternoon, "For those who haven't read, Eddie and I got engaged over the holidays. That's the news. It's for real this tine and the first time EVER!"

She continued,  "Thank you for all your well wishes!! We are extremely excited and look forward to a beautiful future. It's been an incredible last few days, I was shocked!!! We are blessed, our families are so happy and our lives are filled with love."

Rimes, 28, and Cibrian, 37, kicked off their relationship in 2009 while filming the Lifetime TV movie "Northern Lights." The hitch then? Both were married! Following the outing of their relationship, Cibrian split from former model Brandi Glanville (their divorce became official in November) and Rimes split from Dean Sheremet (their divorce was finalized in June).

Once married, Rimes will be stepmom to Cibrian's two children with Glanville, Mason, 7, and Jake, 3.

As TooFab exclusively reported in October, "Shape" magazine's editor-in-chief at the time, Valerie Latona, sent a letter  to some readers who were upset that a perceived "home wrecker" was featured on the magazine's cover. Latona described the move as "a terrible mistake," but she subsequently distanced herself from that letter saying her words were taken out of context.

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