“In a sad and honest note Brian and I ended our relationship in March. We remain close friends and are committed to always doing our best for our amazing kids,” she wrote on Twitter. “Thank you for the support and have a beautiful holiday. Xo A.”
Porter, 36, and Autenrieth, 39, wed in 2012 at a California ranch in the Santa Monica mountains in front of 100 guests after being friends for 13 years, she told PEOPLE at the time.
The former Curly Sue star gave birth to their first child, a son named Mason, later that year. In 2014, they welcomed a daughter named Aria.
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“When I look at my life, I know I have what I have because I’m sober and because I turned away from the places I could’ve gone,” Porter — who has been open about her struggles with alcoholism — told PEOPLE after winning The Voice last year. “I turned away from the dark side and I have been infinitely blessed with my family and my children and now a career.”