Luther James Grosvenor (born 23 December 1946) is an English rock musician, who played guitar in Spooky Tooth,[1] briefly in Stealers Wheel and, under the pseudonym Ariel Bender, in Mott the Hoople and Widowmaker.

[2] For contractual reasons, he changed his name to Ariel Bender, at the suggestion of singer-songwriter Lynsey de Paul, for his stint with Mott the Hoople.

[3] According to Mott's lead singer Ian Hunter, interviewed in the documentary The Ballad of Mott the Hoople, the band were in Germany with Lynsey de Paul for the TV show Hits-a-Go-Go in Germany on 24 June 1973[4] when lead guitarist Mick Ralphs walked down a street bending a succession of car aerials in frustration.

[2] These songs led to Grosvenor signing a deal with the New York City based Brilliant Recording Company and produced the Floodgates album.

In 2009, he worked with London act, The Winter Olympics, recording guitar parts for their song, "The Great Outdoors",[6] which was released in August 2010.