Kate Mara and Jamie Bell Are Engaged -- See the Ring!

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This is "fantastic for" them!

Kate Mara and her Fantastic Fourco-star, Jamie Bell, are engaged, Mara's rep confirms to ET.

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Over the weekend, the 33-year-old actress tweeted a photo of herself donning a ring on THAT finger, causing the engagement speculation to go into overdrive.

The couple has been dating since late 2015, shortly after filming their superhero movie.

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Congratulations to the happy couple!

Watch the video below for more celebrity engagement news.

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