
Gavan O’Herlihy (29 July 1951 – 15 September 2021) was an Irish actor whose career spanned film, television, and stage, marked by a distinctive presence and a talent for commanding roles. Born in Dublin to actor Dan O’Herlihy and artist Elsie Bennett, he spent his early years between Ireland and the United States, eventually attending Phillips Academy Andover and later the University of California, where he excelled as a champion tennis player before turning fully toward acting. O’Herlihy first gained attention as Chuck Cunningham in the early episodes of Happy Days, a role he deliberately left behind to avoid being typecast in light comedic parts. He instead built a diverse and often hard‑edged body of work, appearing in major productions including Never Say Never Again (as the villainous Jack Petachi), Superman III, Death Wish 3, Willow (as the warrior Airk Thaughbaer), and the acclaimed miniseries Lonesome Dove. His television career was equally varied, with appearances in Twin Peaks, Star Trek: Voyager, The Six Million Dollar Man, Murder, She Wrote, and numerous British productions after relocating to the UK. Across more than fifty screen credits, O’Herlihy became known for portraying complex, often formidable characters — soldiers, outlaws, antagonists, and men with a dangerous edge — roles he embraced for the challenge and dramatic weight they offered. Off‑screen, he was regarded as thoughtful, private, and deeply committed to his craft, preferring character work over celebrity. He died in Bath, England, on 15 September 2021 at the age of 70, reportedly of natural causes.
Acting
July 29, 1951
September 15, 2021
70 years old
Dublin, Ireland
1.3

The Descent: Part 2
Vaines

Butterfly Man
Bill Kincaid

Cruise of the Gods
Mickey

18 Wheels of Justice

Prince Valiant
King Thane

Sharpe: The Legend
Leroy

Top of the World
Lieutenant Logan

Jonathan Creek
Hal Drucker

Midsomer Murders
George Arlington

The Shooter
Dick Powell

Star Trek: Voyager
Maje Jabin

The Memoirs of Sherlock Holmes
John Garrideb / James Winter

The Last Outlaw
Marshal Sharp

Sharpe's Eagle
Captain Thomas Leroy

Sharpe
Cpt. Leroy

Conagher
Chris Mahler, Cowboy

Twin Peaks
Officer Preston King

Red King, White Knight
Clancy

Tales from the Crypt
Richard

Lonesome Dove
Dan Suggs

Willow
Airk

China Beach

A Killing on the Exchange
Dan Maitland

Death Wish 3
Manny Fraker

The Dirty Dozen: Next Mission
Conrad E. Perkins

Space Riders
Ron Harris

Sherlock Holmes
John Garrideb / James Winter

Cover Up

Superman III
Brad Wilson

The Secret Adversary
Julius P. Hersheimmer

Never Say Never Again
Jack Petachi

Agatha Christie's Partners in Crime
Julius P. Hersheimmer

Matt Houston
Michael Sheridan

We'll Meet Again
Capt Red Burwash

A Rumor of War
Stanton

Mark Twain: Beneath the Laughter
Young Clemens

Sergeant Matlovich vs. the U.S. Air Force
Art Stinson

A Wedding
Wilson Briggs

A Death in Canaan
Father Mark

The Amazing Spider-Man
David

The Ghost of Cypress Swamp
Big Bob Landers

The Bionic Woman

The California Kid
Tom

The Healers

Happy Days
Chuck Cunningham

The Six Million Dollar Man
Dan

Police Woman
Gordon Stuart

Call to Danger
Mechanic

The Mary Tyler Moore Show
Josh McBride (as Gavin O'Herlihy)

Marcus Welby, M.D.
Herb Frane