Chris Klein Is Engaged to Laina Rose Thyfault
12/23/2014 AT 01:45 PM EST
The American Pie actor, 35, proposed to girlfriend Laina Rose Thyfault, 29, in Venice Beach over the weekend, his rep, Jaime Primak Sullivan, confirms to PEOPLE exclusively.
She adds, "Chris and Laina are very happy and look forward to celebrating their engagement over the holidays."
The pair have been quietly dating for 3½ years after meeting at a mutual friend's wedding.
Klein's happy news is especially sweet since he has worked hard to maintain his sobriety after some difficult years struggling with alcoholism.
"It got to the point where I was a fragile shadow of the young man that came into this business," he told PEOPLE in 2012. "Today, I'm the luckiest guy alive."