Mackenzie Phillips Collared for Drugs

Former sitcom star, who has had history of drug woes, gets busted for cocaine and heroin possession at LAX

Mackenzie Phillips is seriously going to need to take it One Day at a Time after her latest run-in with the law.

The 48-year-old former TV star, whose role on the hit CBS sitcom was derailed in the early '80s due to a nasty drug habit, was collared this morning at Los Angeles International Airport after allegedly trying to bring heroin and cocaine aboard an airliner.

Phillips was going through security at LAX's Terminal 4 at approximately 10 a.m., when her bag was checked by a TSA officer, according to Sgt. Jim Holcomb, spokesman for Los Angeles Airport Police.

"During a second screening process, a small amount of what was believed to be heroin and cocaine was discovered on her person," Holcomb tells E! News.

Airport police were called to the scene and arrested Phillips on suspicion of possession of a controlled substance.

“She is being booked at Pacific Division and then transferred to Van Nuys,” adds Holcomb. Bail was set at $10,000. Half-sister Bijou Phillips was spotted leaving the Van Nuys Jail at around 4:40 p.m.

Phillips, who played sister to Valerie Bertinelli on the long-running CBS show, is well acquainted with the booking process.

During One Day at a Time's 1979-80 season, she was collared for cocaine possession.

After turning up late for rehearsals on multiple occasions, producers gave her a six-week leave of absence. But her behavior continued to worsen until producers gave up and fired her.

Following a stint in rehab, Phillips rejoined the show, only to quit two years later when her drug problems persisted.

The daughter of Mamas & the Papas founder John Phillips (whom she blames for her drug habit) and socialite Suzy Adams, Phillips is the product of a showbiz family. Her stepmother is singer-actress Michelle Phillips and half-sisters include Bijou and Chynna Phillips.

Mackenzie Phillips, who performed as part of the revived Mamas & the Papas until her father's death in 2001, got her start in the industry at the age of 13 in the 1973 TV movie Go Ask Alice, about a 14-year-old girl pulled into a world of sex and drugs. Other credits include roles in American Graffiti, Baretta, ER, NYPD Blue and, most recently, CBS' Cold Case .

(Originally published Aug. 27, 2008 at 11:38 a.m. PT.)