Leif Garrett reaches for the bottom AGAIN...

Seventies teen idol Leif Garrett was arrested by the Los Angeles County Sheriff in January 2006 and charged with possession of heroin.

Garrett, 44, was held without bail after deputies discovered an outstanding warrant out for him for allegedly violating his probation after copping a guilty plea in March 2005 to cocaine possession.

No word on if this will cut into his work as a reality show star...