---
title: "Thelma Griffin: The Griffins | familyguy.co.uk"
canonical: "https://familyguy.co.uk/characters/thelma-griffin/"
updatedDate: 2026-09-06
author: Alex Moss
description: "Thelma Griffin: Peter's mother. Voiced by Florence Stanley and Phyllis Diller. First appeared in Holy Crap."
---

# Thelma Griffin

Peter's mother. Voiced by Florence Stanley and Phyllis Diller.

## Facts

| Fact | Detail |
| --- | --- |
| Household | The Griffins |
| Role | Peter's mother (draft, awaiting review) |
| First appearance | [Holy Crap](https://familyguy.co.uk/episodes/s02e02-holy-crap/) (S02E02, 30 September 1999) |
| Spouse | [Francis Griffin](https://familyguy.co.uk/characters/francis-griffin/) |
| Children | [Peter Griffin](https://familyguy.co.uk/characters/peter-griffin/) |
| Wikidata | [Q9087248](https://www.wikidata.org/wiki/Q9087248) |

## About

Thelma Griffin is the mother of Peter Griffin and the wife of Francis Griffin, which makes her the mother-in-law of Lois and a paternal grandmother to Stewie, Chris and Meg. She is an Irish American Catholic, aged 85. Florence Stanley voiced the part for her first appearance, in "Holy Crap", and Phyllis Diller took it over for the appearances that followed. Alex Borstein voiced her as a young woman in "Don't Be a Dickens at Christmas". The episode "Mom's the Word" establishes that Thelma has died, of a stroke.

## Credited appearances

Credited in the principal cast or guest list of 5 episodes across 4 seasons. IMDb records up to ten voice credits per episode, so this is a floor, not a full list.

### Season 2

- S02E02 [Holy Crap](https://familyguy.co.uk/episodes/s02e02-holy-crap/) (voiced by Florence Stanley)

### Season 5

- S05E02 [Mother Tucker](https://familyguy.co.uk/episodes/s05e02-mother-tucker/) (voiced by Phyllis Diller)
- S05E10 [Peter's Two Dads](https://familyguy.co.uk/episodes/s05e10-peters-two-dads/) (voiced by Phyllis Diller)

### Season 6

- S06E06 [Padre de Familia](https://familyguy.co.uk/episodes/s06e06-padre-de-familia/) (voiced by Phyllis Diller)

### Season 16

- S16E09 [Don't Be a Dickens at Christmas](https://familyguy.co.uk/episodes/s16e09-dont-be-a-dickens-at-christmas/) (voiced by Alex Borstein)

No character imagery appears on this site.

## Provenance

- Source: [Wikipedia: Thelma Griffin](https://en.wikipedia.org/wiki/Thelma_Griffin)
- Source: [Wikidata Q9087248](https://www.wikidata.org/wiki/Q9087248)
- Source: [Wikipedia: List of Family Guy characters](https://en.wikipedia.org/wiki/List_of_Family_Guy_characters)
- Data refreshed: 2026-09-06
- Note: The profile text was written for this site from the sources listed, by Claude in Claude Code on 2026-09-08, awaiting editorial review. Facts only; no dialogue is reproduced. Role lines are curated on this site; voice actor, first appearance and creator come from Wikidata.

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