Alistair Manson "Ally" McErlaine (born 31 October 1968, Glasgow, Scotland) is a Scottish guitarist, best known for his work with the band Texas, which he has been a member of since 1988. Ally is also a member of Red Sky July who released their self-titled debut album on 17 October 2011.
McErlaine married Shelly Poole from Alisha's Attic in 2001. Other works aside from Texas, included a guest appearance on Rufus Wainwright's second album, Poses (2001), and Alain Bashung's 1994 album Chatterton. He was also the lead guitarist on the soundtrack album for the 2004 remake of the film, Alfie, along with Mick Jagger and David A. Stewart.
He wrote and played guitar on two songs on Daisy Dares You's album, Rush on Jive Records.
McErlaine also wrote and played on the song "Hope", with Jack Savoretti and his wife Shelly Poole from her album, Hard Time for the Dreamer. It was released on Transistor Records in June 2005. It received airplay on BBC Radio 2 in November 2005.
McErlaine also played guitar on Gabrielle's fifth album, Always. In 2009, he started the alternative country band, Red Sky July, with his wife and Charity Hair, the latter a singer from Miami, Florida. They were set to record an album scheduled for release in 2010.