Survivor engagement announced on Twitter.

Survivor engagement?

Former contestants Whitney Duncan and Keith Tollefson are going to get married.

The former Survivor contestants are set to head down the aisle, and the country singer announced the good news to her followers on Twitter, writing, "I'm going to marry this man."

She also posted a photo of a sparkling engagement ring on her Facebook page with a caption that reads, "He did good."

See the pic above.

Wetpaint reminds that "Whitney's story is a bit controversial since the country singer was secretly married when she met Keith and they became a couple on Survivor in the summer of 2011."

Her first marriage failed and Whitney commented on that on Twitter.

She tweeted, "Hey kids, don't ever elope w someone u hardly know. Not a good idea! U might meet your soulmate. & No one ever lets the past be the past."

Congrats to the happy couple!

(Image: Twitter - Whitney Duncan)