Dean DeLeo (born August 23, 1961) is an American guitarist known for his work with rock band Stone Temple Pilots.

Dean's younger brother Robert met future vocalist Scott Weiland after the latter witnessed him perform at various gigs.

The band quickly rose to fame with the release of their debut album Core, which sold over 8 million copies.

The record sales were propelled by the release of the singles "Sex Type Thing" and "Plush", and helped establish Stone Temple Pilots as one of the many popular grunge bands in the early 1990s.

Stone Temple Pilots released a total of five studio albums and managed to sell over 30 million records worldwide.

The end result was a song that the three liked, so they contacted Ray Luzier, a famed session drummer, and Army of Anyone was formed.