Rosie O'Donnell got her fiancee quite a rock -- and last night, she showed it off to her fans on Twitter!
The talk show host confirmed yesterday she and girlfriend since the summer, Michelle Rounds, got engaged ... tweeting last night "so so so happy" along with a photo of the diamond ring.
No word yet on when they'll tie the knot, but it'll be the second marriage for Rosie, who wed Kelli Carpenter in 2007 but split in 2010.
Check out more celeb engagement rings above!
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