Douglas Glenn Colvin (September 18, 1951 – June 5, 2002), known professionally as Dee Dee Ramone, was a German-American musician, singer and songwriter best known as founding member, songwriter, bassist and occasional lead vocalist for punk rock band the Ramones.

Though nearly all of the Ramones' songs were credited equally to all the band members, Dee Dee was the band's most prolific lyricist and composer, writing many of their best-known songs, such as "53rd & 3rd", "Commando", "Rockaway Beach", and "Poison Heart". He was initially the band's lead vocalist, though his (then) inability to sing and play bass at the same time resulted in original drummer Joey Ramone taking over the lead vocalist duties (however, he still sang lead vocals in the band on occasion). Dee Dee was the band's bassist and songwriter from 1974 until 1989, when he left to pursue a short-lived career in hip hop music under the name Dee Dee King. He soon returned to his punk roots and released three solo albums featuring brand-new songs, many of which were later recorded by the Ramones. He toured the world playing his new songs, Ramones songs and some old favorites in small clubs, and continued to write songs for the Ramones until 1996, when the band officially retired.

Dee Dee struggled with drug addiction for much of his life, particularly heroin. He began using drugs as a teenager, and continued to use for the majority of his adult life. He appeared clean in the early 1990s but began using heroin again some time later. He died from a heroin overdose on June 5, 2002.