911 (pronounced "Nine One One") are an English boy band consisting of members Lee Brennan, Jimmy Constable and Simon "Spike" Dawbarn. They were formed in 1995 and released their debut single in May 1996. They went on to score 10 UK top 10 singles before their split in early 2000. The trio reunited in 2005, when they participated in the ITV reality show Hit Me, Baby, One More Time and have performed live shows occasionally since. In October 2012, it was announced that 911 would again reunite for The Big Reunion documentary on ITV2 in January 2013, along with Atomic Kitten, Liberty X, B*Witched, Five and Honeyz.

Blue were later added to the show as well.