William Daniels at 99: The Voice Behind KITT, Mr. Feeny and a 75-Year Marriage

Some actors are remembered for a single unforgettable performance. Others manage to become part of several generations, sometimes without audiences even seeing their faces.

William Daniels belongs firmly in the second group.

At 99 years old, the veteran American actor has a career stretching across theater, film and television. To some viewers, he will forever be the unmistakable voice of KITT, the extraordinarily intelligent talking car from Knight Rider. To others, he is George Feeny, the demanding but compassionate teacher from Boy Meets World.

Yet away from those famous roles is another remarkable part of his story.

Daniels has shared most of his adult life with actress Bonnie Bartlett. The couple married on June 30, 1951, and in June 2026 they reached an extraordinary milestone: their 75th wedding anniversary.

But Daniels’ story began long before either KITT or Mr. Feeny entered popular culture.

A Career That Started Decades Before Television Fame

William David Daniels was born in Brooklyn, New York, on March 31, 1927.

His performing career began when he was young, and his professional experience ultimately stretched across Broadway, television and motion pictures. Long before younger audiences discovered him through popular television series, Daniels had already built an extensive career as a serious actor.

His screen credits eventually included films such as The Graduate, in which he portrayed Mr. Braddock, and television productions that demonstrated a range far wider than the two roles for which many viewers know him today.

Then came a part in the 1980s that required something unusual.

Audiences would hear Daniels constantly — but they would not normally see him.

The Voice That Turned a Car Into a Character

In Knight Rider, David Hasselhoff played Michael Knight, but his technologically advanced Pontiac Trans Am had a personality of its own.

The car was KITT — the Knight Industries Two Thousand.

William Daniels provided KITT’s distinctive voice.

His controlled delivery gave the artificial intelligence a combination of intelligence, confidence, humor and occasional exasperation. The performance helped transform what could have been merely a futuristic vehicle into one of the show’s central characters.

That distinction matters.

KITT did not need a human face to develop a recognizable personality. Daniels accomplished much of that through timing and vocal performance alone.

For viewers who watched Knight Rider during its original 1982–1986 run, the voice became inseparable from the car.

But another generation was about to discover Daniels in an entirely different way.

This time, he would be standing in front of a classroom.

The Teacher Who Became More Than a Teacher

When Boy Meets World premiered in 1993, William Daniels took on the role of George Feeny.

Initially, Mr. Feeny could appear to be the classic strict teacher: intelligent, formal and unwilling to lower his expectations simply because his students were young.

As the series progressed, however, the character became much more.

Feeny served as an educator, neighbor and mentor to Cory Matthews and the other young characters. He frequently encouraged them to think seriously about responsibility, relationships, education and adulthood.

The role resonated strongly enough that decades later Daniels remains closely associated with the character.

Mr. Feeny’s influence was fictional, of course, but the affection audiences developed for him was real.

Daniels had already given television one memorable voice. With Feeny, he gave another generation a memorable face.

His career, however, contains another major television achievement that should not be overlooked.

An Emmy-Winning Chapter

Before Boy Meets World, Daniels was acclaimed for portraying the brilliant but difficult Dr. Mark Craig on the medical drama St. Elsewhere.

His performance earned him two Primetime Emmy Awards.

The series also connected his professional life with his personal one. Bonnie Bartlett appeared on St. Elsewhere as Ellen Craig, the wife of Daniels’ character.

Bartlett is an accomplished performer in her own right and also won Emmy Awards for her work.

Their partnership, however, began years before those television successes.

Daniels and Bartlett met while attending Northwestern University and married in 1951.

What followed was not a flawless Hollywood fairy tale — and the couple themselves have been unusually candid about that.

Seventy-Five Years Together

On June 30, 2026, William Daniels and Bonnie Bartlett celebrated 75 years of marriage.

It is an exceptional milestone.

Their relationship has endured changes in careers, family life and an entertainment industry that transformed dramatically around them.

Bartlett has also spoken publicly about difficult periods during their early marriage. In her memoir and subsequent interviews, she discussed relationships outside their marriage during those years and acknowledged that this chapter was complicated and painful.

Their longevity, therefore, is not a story about pretending that seven and a half decades passed without difficulties.

It is a story about remaining together through them.

In 2026, Daniels explained that they had never seriously considered replacing each other and consequently had to find ways to work through their problems.

After 75 years, the result speaks for itself.

Their family today includes their sons Michael and Robert and four grandchildren.

And when Daniels reached another remarkable milestone in March 2026, family was again at the center of the occasion.

William Daniels Turns 99

Daniels celebrated his 99th birthday on March 31, 2026.

Rather than presenting himself as someone completely removed from public life, he has continued finding ways to interact with the audience that remembers him.

Daniels has said that he works with a personal trainer, attends conventions and records personalized Cameo videos for fans.

He told People around his 99th birthday that producing those videos gives him an opportunity to continue performing and remain productive.

That detail feels particularly appropriate for someone whose career has crossed so many different eras.

Daniels was born before commercial television became an everyday fixture in American homes. He built experience on the stage, appeared in major films, became part of landmark television programs and eventually entered the world of personalized digital messages for fans.

Few careers provide such a clear bridge between generations of entertainment.

More Than KITT and Mr. Feeny

It would be easy to summarize William Daniels with two names: KITT and Mr. Feeny.

But doing so would leave out much of the story.

He is a Broadway veteran, a two-time Emmy-winning television actor and a performer whose credits extend across decades. He portrayed John Adams on stage and screen, appeared in films including The Graduate, became Dr. Mark Craig on St. Elsewhere, gave KITT his unmistakable voice and later became one of television’s best-remembered fictional teachers.

Meanwhile, his partnership with Bonnie Bartlett developed alongside that extraordinary professional journey.

Their 75-year marriage has included success, hardship, family and changes that they have discussed openly rather than presenting their relationship as perfect.

Perhaps that makes the milestone even more meaningful.

At 99, William Daniels is not remembered simply because he remained in the entertainment business for a very long time.

He is remembered because several of the characters he helped create stayed with audiences.

Some fans still hear his voice and immediately imagine a black Pontiac with a glowing red scanner.

Others see him and remember a teacher standing before his students, expecting them to become better versions of themselves.

And behind both memories is the same performer — a Brooklyn-born actor whose professional life spans more than eight decades and whose marriage has now reached three-quarters of a century.

William Daniels does not need a new role to establish his legacy.

He built it one performance at a time.

And at 99, with Bonnie Bartlett still beside him after 75 years of marriage, his remarkable story has already lasted far longer than almost any television series ever could.