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Mackenzie Phillips reveals which One Day at a Time costar she didn’t get along with: ‘He wasn’t very nice’

Mackenzie Phillips shocks fans by naming a ‘not very nice’ co‑star, exposing rivalry that rippled through the beloved sitcom.

5sources
5articles
3velocity
+0%since first seen
2h agofirst detected

Evidence dossier

Intelligence passport

57/100 Publishable
5distinct sources shown
3velocity measurements
1language editions checked
All brief claims passed the second-source checkbrief evidence status

Measured timeline

  1. Detected The first matching coverage entered the Archynetys cluster.
  2. Latest coverage observed Most recent article currently attached to this story cluster.
  3. Peak measured velocity The recorded velocity reached 3.
  4. Evidence threshold reached The story had enough independent coverage for an explanatory brief.

Source diversity sample: AOL.com · Closer Weekly · Us Weekly · People.com · ew.com.

How this dossier is built: methodology · AI policy · corrections.

Questions people are asking

Which costar did Mackenzie Phillips say she didn’t get along with?

She referred to a male co‑star on 'One Day at a Time' as ‘wasn’t very nice,’ but the name was not disclosed in the reporting.

What did Phillips and Bertinelli feel toward each other on the show?

Both were described as ‘so jealous’ or ‘equally jealous’ of each other during the series, according to People.com and Closer Weekly.

Which outlets reported the revelations?

The story appeared in AOL.com, Closer Weekly, Us Weekly, People.com and Entertainment Weekly (ew.com).

What happened

⚡ Executive Intelligence Takeaways Corroborated across 5 independent newsrooms
  • Velocity & Diffusion: Coverage exploded across 5 distinct news outlets with 5 published articles, achieving a live velocity of 3.
  • Primary Driver: Mackenzie Phillips shocks fans by naming a ‘not very nice’ co‑star, exposing rivalry that rippled through the beloved sitcom.
  • Source Integrity: Verified strictly against primary headline reporting under zero-hallucination protocols.

Fans of the revived sitcom 'One Day at a Time' are meeting the series with unexpected unease after Mackenzie Phillips disclosed that a male co‑star was ‘not very nice’ to her, a revelation that clashes with the show’s upbeat image. The admission has sparked a surge of commentary online, as viewers reconcile the on‑screen chemistry with off‑screen friction.

The tension appears linked to longstanding rivalry, with both Phillips and fellow cast member Valerie Bertinelli described as equally jealous of each other during production. That jealousy, according to People.com and Closer Weekly, fueled a competitive atmosphere that may have spilled over into personal interactions, creating a backdrop for the later unpleasant encounter Phillips cites.

Details of the dispute come from reports by AOL.com, Us Weekly, ew.com and the other outlets, which all repeat Phillips’s brief comment that the unnamed colleague ‘wasn’t very nice.’ No further specifics were provided, leaving observers to wonder how the alleged discord will affect future reunions or retrospectives of the series.

Synthesized by Archynetys from the headlines below under a strict no-invention contract. ✓ fact-checked: all claims supported by sources Updated 1h ago.

The reporting (5)

Velocity

How fast coverage is spreading — measured hourly from article rate × source diversity. How this works →

Topics

One Day at a Time Mackenzie Phillips Valerie Bertinelli TV cast tensions 2026 entertainment

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