Rod Stewart's troubled son Sean has relapsed after a year-long battle to stay sober, according to reports.

The reality TV star and celebrity DJ fought his alcohol addiction in front of millions of TV viewers when he appeared on season two of "Celebrity Rehab with Dr. Drew" last year.

Stewart, 29, had reportedly managed to quit booze for good following several unsuccessful attempts at rehab prior to the show. He sparked fresh fears for his health in recent weeks after he was seen partying in California - and new reports suggest Stewart is back on the bottle.

A source tells the New York Post, "He is drinking again and has lost everyone's trust. He's been dropped by his publicist and manager."

Sean Stewart's former spokesperson has declined to comment.

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