---
title: "Mickey McFinnigan: The Griffins | familyguy.co.uk"
canonical: "https://familyguy.co.uk/characters/mickey-mcfinnigan/"
updatedDate: 2026-09-06
author: Alex Moss
description: "Mickey McFinnigan: Peter's biological father. Voiced by Seth MacFarlane. First appeared in Peter's Two Dads."
---

# Mickey McFinnigan

Peter's biological father. Voiced by Seth MacFarlane.

## Facts

| Fact | Detail |
| --- | --- |
| Household | The Griffins |
| Role | Peter's biological father (draft, awaiting review) |
| First appearance | [Peter's Two Dads](https://familyguy.co.uk/episodes/s05e10-peters-two-dads/) (S05E10, 11 February 2007) |
| Children | [Peter Griffin](https://familyguy.co.uk/characters/peter-griffin/) |
| Wikidata | [Q9032327](https://www.wikidata.org/wiki/Q9032327) |

## About

Mickey McFinnigan is the biological father of Peter Griffin, and so the father-in-law of Lois and the biological grandfather of Stewie, Chris and Meg. Seth MacFarlane voices him. He lives in Ireland, where his standing rests on his being the town drunk, a position his neighbours hold in high regard. Peter seeks him out in "Peter's Two Dads", having learned that Francis Griffin, newly dead, was not his real father. Mickey is drawn to look like Peter, with the addition of a green waistcoat and a red beard, and he keeps a talking sheep called O'Brian whose manner resembles Brian's. He will not accept Peter as his son until Peter beats him in a contest of drinking.

## Credited appearances

Credited in the principal cast or guest list of 1 episode across 1 season. IMDb records up to ten voice credits per episode, so this is a floor, not a full list.

### Season 5

- S05E10 [Peter's Two Dads](https://familyguy.co.uk/episodes/s05e10-peters-two-dads/) (voiced by Seth MacFarlane)

No character imagery appears on this site.

## Provenance

- Source: [Wikipedia: Mickey McFinnigan](https://en.wikipedia.org/wiki/Mickey_McFinnigan)
- Source: [Wikidata Q9032327](https://www.wikidata.org/wiki/Q9032327)
- 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.

---

Unofficial fan resource. Not affiliated with, endorsed by, or sponsored by FOX, Disney, or Fuzzy Door Productions.