The That 70's show beauty and her talented beau made things official after getting their license two weeks ago.
Scientologist Prepon, 38, posted a photo of herself via Instagram on Sunday in a wedding gown with a bouquet of flowers.
The caption reads: "Just Married! Thank you for all the love and support. Wishing all of us the good stuff!"
Her 37-year-old husband looks dapper in a white shirt, black tie with a vest and summer hat as the couple are all smiles.
The couple got engaged in 2016 and they have one daughter together, Ella.
'Hell Or High Water' star Foster was previously engaged to actress Robin Wright twice.
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