Shedding light on the Nixon era with his groundbreaking interviews, journalist David Frost passed away on Saturday (August 31).

While aboard the Queen Elizabeth cruise ship, where he was scheduled to make a speech, the 74-year-old died of a suspected heart attack.

Well-respected among his colleagues and subjects, the Brit was the only person to have interviewed all six prime ministers between 1964 and 2007, in addition to seven U.S. presidents between 1969 and 2008.

His dramatic interview with the resigned President led to a hit play and in 2008, that was turned into a movie called "Frost/Nixon."