Stephen Paul Lamacq (born 16 October 1964), sometimes known by his nickname Lammo (given to him by John Peel), is an English disc jockey, currently working with BBC Radio 6 Music.

Lamacq was appointed Member of the Order of the British Empire (MBE) in the 2025 New Year Honours for services to broadcasting and to music venues.

Lamacq cites Orchestral Manoeuvres in the Dark's "wonderful" 1979 single "Electricity" as his inspiration to become a disc jockey, noting that he wanted to afford air time to similar, "curious" music.

In the early 1990s, Lamacq appeared regularly on the Gary Crowley show, a three-hour Sunday afternoon indie music programme on the BBC station GLR.

Colin Murray served as a temporary replacement for six months until Zane Lowe's contract with the London station XFM ended in June 2003, where he took up a permanent position.

He presented the In New Music We Trust programme every Monday night from 9 to 10 pm until August 2009, when it was announced he would be leaving Radio 1 as part of a shakeup in the scheduling.

One night of the nationwide tour was hosted at The New Adelphi Club in Hull, East Yorkshire, on 26 January 2016, with Mark Morriss as the headline act.