The pounds 400,000 deal was signed for the original asking price after "editorial" negotiations. Channel 4 said that the interviewer, Jon Snow, will be "both tough and fair" with Miss Lewinsky, who has agreed to speak about "her life and the events of the last year, including her relationship with Bill Clinton".
The deal means that the channel can cash in on worldwide rights for the exclusive, as the planned American network television interview is restricted to screenings in the United States and Canada. "This is a real coup for Channel 4," David Lloyd, head of news, current affairs and business, said.
Other British broadcasters have reportedly been trying to secure an interview, but the negotiations were not over money, Channel 4 said: "The problems have been about what she can and cannot say. We have been talking to her lawyers and are now happy we are going to have an interview with some editorial value."
The interview will be conducted in the US and will be transmitted, probably in February, within hours of her American interview, which is believed to be with Barbara Walters.