D

Donal O'Neill

Acting
Updated: Apr 15, 2026
3Total Films
8.0 Highest Rated
Birth Place: Galway, Ireland

About Donal O'Neill

Donal O’Neill makes “real food” documentaries exploring health and human performance. Movies so far include: Cereal Killers (2013); Run on Fat (2015); The Big Fat Fix (2016) that premiered in the European Parliament. Donal is also co-author with Dr Aseem Malhotra of the best-seller, The Pioppi Diet. On his website, Let Fat Be Thy Medicine, Donal describes himself as a “lean ex-athlete with no family history of overweight/obesity but a whole lotta heart disease and diabetes staring at me”. Donal says that once upon a time he believed that fat was bad, but he now ranks that right up there with his belief in Santa Claus. Cereal Killers was his first journey into film (he’s still not sure if it’s opened Pandora’s Box!) and this website will support the film and his thoughts beyond.

Donal O'Neill Movies & Career Overview

The filmography of Donal O'Neill reflects exceptional commercial consistency. Across 3 major appearances, the actor has built a reputation through performances in multiple genres and storytelling styles.

Dominant Genre

A large portion of Donal O'Neill's work falls within the Documentary genre, where audiences tend to respond most strongly to their on-screen presence.

Success Ratio

Approximately 100% of Donal O'Neill's films maintain ratings above 6.5, indicating a consistent level of audience approval.

One of the most highly rated entries in their career remains The Big Fat Fix, which stands out as a key performance.

Advertisement

Best Donal O'Neill Movies Ranked

Must-watch hits from Donal O'Neill's career based on audience ratings.

Full Filmography

Every movie Donal O'Neill has appeared in, with audience ratings and verdicts.

YearMovieCharacterSuccessMore
2016 The Big Fat Fix Self - Producer, Cereal Killers Super Hit Similar →
2015 Run on Fat: Cereal Killers 2 Himself Super Hit Similar →
2013 Cereal Killers Himself Hit Similar →

Donal O'Neill - Frequently Asked Questions

What is the best movie of Donal O'Neill?

According to audience ratings, the best movie starring Donal O'Neill is "The Big Fat Fix" with a rating of 8.0/10.

How many movies has Donal O'Neill acted in?

Donal O'Neill has been featured in at least 3 major films throughout their career.

Advertisement