"Teen Mom" star Jenelle Evans is engaged to her on-again-off-again boyfriend Gary Head!

The reality star posted a picture on Twitter of her engagement ring and wrote, "I'm the luckiest girl in the world to have Gary Head in my life!"

Just weeks ago, Gary and Jenelle were broken up over claims that he was cheating on her and even hit her and she briefly reunited with her other troubled ex Kieffer Delp.

Source: RadarOnline.com