Mackenzie Phillips Talks About Leaving 'One Day at a Time'

Mackenzie Phillips told Fox News that she and Valerie Bertinelli used to drink wine and do cocaine during breaks on the set of 'One Day at a Time'.

Mackenzie Phillips is talking about what happened when she left 'One Day at a Time'.

Mackenzie Phillips recently spoke at Fanboy Expo Knoxville about a 'morals clause' in her contract that led to her leaving the show.

The show 'One Day at a Time' made Mackenzie Phillips famous, along with co-stars Bonnie Franklin and Valerie Bertinelli. But behind the scenes, Phillips was struggling with addiction, which led to special rules in her contract.

Mackenzie Phillips said she and Valerie Bertinelli drank wine and did cocaine during breaks on the show.

Mackenzie Phillips played Julie Cooper on 'One Day at a Time'. She said she had a 'morals clause' in her contract before she left the show.

Mackenzie Phillips said everyone on the show had a morals contract, but hers was more specific.

If the producers thought Mackenzie Phillips was under the influence, they could take her to a doctor for a urine test.

Mackenzie Phillips's character was written off the show after she was fired.

Everything changed for Mackenzie Phillips during a lunch break.

Mackenzie Phillips talked about doing cocaine with Valerie Bertinelli during breaks.

Mackenzie Phillips remembered a day when she was asleep on the couch during lunch. The producer, Patricia Fass Palmer, woke her up and said they would take her to a doctor for a urine test.

Mackenzie Phillips attended a party at Studio 54 in New York City in 1978.

Mackenzie Phillips asked for more time before the urine test, knowing that cocaine leaves the system quickly. But Palmer said no.

Palmer told Mackenzie Phillips it was time to leave the show.

The cast of 'One Day at a Time' included Mackenzie Phillips, Bonnie Franklin, and Valerie Bertinelli.

Mackenzie Phillips said Palmer told her to grab her things and leave the show. And that's what she did.

Mackenzie Phillips left 'One Day at a Time' for good in 1983.

Mackenzie Phillips starred on 'One Day at a Time' from 1975 to 1980 before her character was written off. She returned for a guest appearance before leaving the show for good in 1983.

Mackenzie Phillips has talked openly about her struggles with addiction.

Mackenzie Phillips attends events and talks about her life.

Mackenzie Phillips said she and Valerie Bertinelli would drive to her house, get in the pool, drink wine, and do cocaine during lunch breaks.

Mackenzie Phillips said Valerie Bertinelli has also talked openly about that time.

Mackenzie Phillips and Valerie Bertinelli starred in 'One Day at a Time', which aired from 1975 to 1984.

Mackenzie Phillips said Valerie Bertinelli didn't have the same kind of addiction she did.

Mackenzie Phillips said drug use was common behind the scenes of the show.

Mackenzie Phillips said she and others would do cocaine in the dressing room.

Mackenzie Phillips said she was lucky to have gotten caught using drugs.

Mackenzie Phillips and Valerie Bertinelli presented at an event together.

Mackenzie Phillips said she was the one who got caught using drugs, but she's grateful for it.

Mackenzie Phillips said her faith and perspective keep her grounded.

Mackenzie Phillips said her faith and life experiences have made her strong.

Mackenzie Phillips attended the christening of the Regal Princess cruise ship.

Mackenzie Phillips said people sometimes feel sorry for her, but she doesn't want their pity.

Mackenzie Phillips said she doesn't want people to feel sorry for her because her experiences made her who she is today.

Mackenzie Phillips said she doesn't think she could erase parts of her past and still be the same person.

Mackenzie Phillips signed copies of her book at Barnes & Noble.

Mackenzie Phillips said if she could go back and change things, she might not be who she is today.

Mackenzie Phillips has been open about her addiction, trauma, and recovery. She wrote about her life in her memoir 'High on Arrival' and explored recovery in 'Hopeful Healing'.

Mackenzie Phillips arrived at the premiere of Netflix's 'One Day at a Time' with executive producer Norman Lear.

Mackenzie Phillips said resilience is central to her life now.

Mackenzie Phillips attended the opening night of 'Annie' with her son Shane Barakan.

Mackenzie Phillips said she has a high resilience and is grateful for her family and faith.

Mackenzie Phillips has used her recovery to help others, working as a counselor and manager at Breathe Life Healing Centers.

Fox News Digital's Danielle Minnetian contributed to this report.

Stephanie Nolasco is an Entertainment Reporter for Fox News Digital.

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