Anthony Rains "Tony" Berg (born October 21, 1954) is an American musician, record producer, and A&R representative, in which role he has been described as an "industry guru".

Berg’s early career began as the Musical Director of the Mark Taper Forum at the Los Angeles Music Center, where he worked on productions including Me and Bessie and Tooth of Crime. He was the guitarist in the American debut production of The Rocky Horror Show which was performed for a year at the Roxy Theatre.

Soon after, he met and was mentored by Jack Nitzsche. Under Jack’s guidance, they worked with The Neville Brothers.

In 1978, he began a three-year tenure as Bette Midler’s musical director, touring the country and working on the album Divine Madness.

As a composer, he wrote and arranged music for Robert Altman’s A Perfect Couple, writing for the Los Angeles Philharmonic, and several movies of the week.

Berg's music career began in the late 1970s as a session guitarist who appeared on notable releases by artists including Air Supply and Debby Boone, as well as on The Rocky Horror Picture Show LP and several Muppet Show records. In the early 1980s, Berg founded Zeitgeist Studios. His first major success was with Michael Penn's 1989 debut March. From there Berg went on to produce for Edie Brickell, Public Image Ltd, Altered State, Aimee Mann, and numerous other artists.

In the early 1990s, Berg became an A&R executive with Geffen Records, where he played a role in signing artists including Beck, Wild Colonials, Black Rebel Motorcycle Club, and At the Drive-In. During this time he continued to produce records and play on a wide variety of releases, among them Peter Gabriel's Up.

Berg’s career as a record producer first garnered attention with the release of Michael Penn’s debut album, March. This was followed by productions of music by Aimee Mann, The Replacements, Squeeze, Public Image Ltd, Wendy & Lisa, Edie Brickell & The New Bohemians, and X.