Fong's acting career resulted from a chance meeting with a Hollywood talent scout. In 1943, while having dinner with some friends in Sacramento, he was approached by a man from Paramount Pictures, who asked if he would like to be in a movie. Fong ended up with a role in a film called China starring Loretta Young and Alan Ladd. He was also offered a 10-week contract for $250 a week.

"It looked like a tremendous fortune and I accepted quickly, afraid they might think twice and back out," he told an interviewer. "I couldn't read lines too well, but World War II was under way and all the studios were looking for actors with Oriental features. I bicycled around from one set to another, playing a Japanese here, a Filipino there, a Chinese on still other days."

The next year, he played one of the sons in Charlie Chan in the Secret Service. Other films in which he appeared included Thirty Seconds Over Tokyo, The Keys of the Kingdom, His Majesty O'Keefe, Flower Drum Song, Our Man Flint, and The Strongest Man in the World.^[3]

First appearing onscreen in Charlie Chan at the Opera as an extra, he returned to the series and is best remembered playing Number Three Son "Tommy Chan" opposite Sidney Toler in six Charlie Chan movies between 1944 and 1946, replacing Victor Sen Yung's Number Two Son, Jimmy.

His later career as an actor included numerous TV appearances in both series and movies. Fong made four guest appearances on Perry Mason, seven on My Three Sons as Ray Wong, and four on Kung Fu. Additionally, he played The Old One in the 1986 TV movie Kung Fu:The Movie.

Modern audiences may remember him as Mr. Tang Wu in Disney's The Love Bug. Actress Michele Lee later said that the 52-year-old actor had to have his jet-black hair sprayed bright white to make him look older.^[4]

Later in life, Fong became a successful restaurateur and opened several Ah Fong (亞方)^[1] restaurants in California.^[3] His chain of five restaurants, which he built up over a 30-year period, resulted from a casual remark made by actor Gregory Peck. After appearing together in The Keys of the Kingdom, Fong recalled, Peck suggested they start a restaurant together. "The idea appealed to me," Fong said. By that time, he was dating his future wife Gloria. Wanting to have a predictable income instead of becoming one more struggling actor, he decided the restaurant would have to be done with his own capital, so he began saving. Two years later, he had $11,000, and in 1946, opened his first Ah Fong's on Hollywood's Vine Street. By 1971, four others had opened. The Ah in the Ah Fong's name is a term of respect in Chinese, but Fong thought up the name while looking at the wrapper of an "Oh Henry!" candy bar. Retiring from the business in 1985, only the Hollywood Ah Fong's remained, owned by a relative, at the time of his death.

An avid golfer and frequent traveler to Asia, Fong practiced meditation and once described himself as "a split personality – half a pound Oriental and eight ounces Yankee". He stated in one interview that he summed up his life this way: "Whatever I am, spiritually speaking, is what I've wanted to be, nothing more and nothing less. Call me a happy man and you call me by my rightful name."^[3]

Fong died of a stroke in Los Angeles, California, in 1987, survived by his wife Gloria, an actress herself known professionally as Maylia Fong; five children; and nine grandchildren.^[5]

• Benson Fong at IMDb