The 25-year-old's representative confirmed their wedding, which took place on February 4, reported the New York Daily News.
"Riley and Ben were married in a small, private afternoon ceremony surrounded by close family and other loved ones. It was a beautiful day and they couldn't be happier," the representative said.
The couple tied the knot just a few months after they announced their engagement in August, when Smith-Petersen posted a photo on his Facebook page that showed the actress and model flashing an engagement ring, along with the caption, "So that happened..."