Stuart Langelaan, stage name Lange, (born 4 June 1974) is a British DJ and record producer.
His career began in 1997, signing his first recording contract with Additive Records in the UK. Early popularity was achieved with a collection of releases attracting the attention of industry leaders such as Paul van Dyk, Sasha, Paul Oakenfold and Judge Jules.
A mixture of slow build-ups and melodic choruses gave Lange several hits in the UK Singles Chart. His first success was his remix of DJ Sakin's "Protect Your Mind", which became a club track. This was followed by his Lost Witness "Happiness Happening" remix. Other remix credits include work for Faithless and The Pet Shop Boys (the Lange remix of "New York City Boy" featured on their PopArt album's bonus "remix disc").