Sir Martyn John Dudley Lewis is a Welsh television news presenter and broadcast journalist who anchored ITN news bulletins between 1978 and 1986 and BBC News television shows from 1986 to 1999. Lewis attended Dalriada School and Trinity College, Dublin, before working as a freelance correspondent for BBC Northern Ireland and Harlech Television (HTV). He joined ITN in 1970 and headed its Northern Bureau from 1971 to 1978. Between 1978 and 1986, Lewis was an anchor for ITN's News at 5.45 and half-hour News at Ten bulletins, creating the "And finally..." segment that features positive stories at the end of each News at Ten programme.

ITV News at Ten is the flagship evening news programme on British television network ITV, produced by ITN and founded by news editor Geoffrey Cox in July 1967. The bulletin was the first permanent 30-minute news broadcast in the United Kingdom, and although initially scheduled for only thirteen weeks due to fears that its length would turn viewers off, the bulletin proved to be highly popular with audiences and became a fixture of the ITV schedule.