Melanie Griffith and Don Johnson's teenage daughter Dakota is planning a sober 2008 after secretly undergoing rehab treatment, according to reports.

The former Miss Golden Globe, 18, recently completed a 30-day program at Malibu, California treatment facility Visions Teen Treatment Center, reports the National Enquirer.

According to sources, former couple Johnson and Griffith realized their daughter needed help after chatting about the wild child's partying ways at her 18th birthday party in October.

Dakota reportedly agreed to get help, and is now a reformed person, thanks to rehab and regular Alcoholics Anonymous meetings.

Both Johnson and Griffith have previously attended rehab - the former Miami Vice star battled drug and alcohol issues at the Betty Ford Clinic in the mid-1990s, while his ex hit rehab for addictions to booze in 1988 and painkillers in 2000.

Johnson's publicist couldn't be reached by press time.

(This news article provided by World Entertainment News Network)