“TLC is saddened to share that Sean Milliken has passed away,” TLC said in a statement. “Viewers first met Sean in 2016 on My 600-lb Life when he weighed over 900-lbs. Over the course of his weight loss journey, he victoriously lost over 400-lbs.” Milliken is the fourth My 600-lb Life veteran to die in the past year and a half. Robert Buchel died in November 2017 of a heart attack before his episode aired. L.B. Bonner died of a self-inflicted gunshot wound last August. And Lisa Fleming also died last August.