"I now pronounce us Mr. and Mrs. Beech! Ahhh! Xx @iamjoshbeech" tweeted the happy newlywed, with a photo of her outfit, to her 227, 755 followers who responded with message of congratulations and compliments on her unconventional dress.
"Happiest day of my life," tweeted Josh in reply. "Love you, @shenaegrimes aka mrs beech x x."
"@shenaegrimes @iamjoshbeech I love you both!" said Shenae's 90210 co-star AnnaLynne McCord, who was there to celebrate with the couple. "Thk you for showing me how special the dedication of marriage can be! Such an amazing night! A."
As well as the £3,200 dress, Shenae comlpeted her look by wearing her glossy hair in a chignon and carrying a bouquet of bright red flowers.
Shenae and Josh, who met last year and got engaged in December, had previously hinted that the occasion would be done their way and not be an over-the-top affair.
"We're just kind of taking it easy, doing it our way" said Shenae in an interview with Life & Style magazine. "We're very, very low-key. We just want to get married."