Fuller, who runs the management group 19 Entertainment, has been tasked with relaunching Victoria Beckham's ailing music career, as well as creating a global branding strategy for Victoria and her husband David.
Reports say that preliminary weapons in the campaign are a website, retailer partnerships and television shows.
Victoria Beckham said in a statement: "I know there is no one better to help me achieve my dreams."
She probably has a point. Fuller is considered a pop Svengali, engineering the success of groups including the Spice Girls and S Club7.
The Spice Girls were considered his greatest success, but the band members decided that they could do a better job managing themselves, and sacked Fuller in 1997.
Fuller's company 19 Entertainment is reported to be in talks with the sports management company SFX, which handles David Beckham, to create joint ventures for the couple.
Victoria Beckham is reinventing herself as a hip hop singer, after her only solo effort, which was self-titled, failed to set the charts alight.
Fuller is the most important figure in the UK music industry, according to a recent poll in trade magazine Music Week. The magazine describes him as the "music industry leader" based on his 96 number-one singles and for launching not only the Spice Girls, but S Club 7 and the 'Pop Idol' framchise. He is thought to have built a fortune of around 拢90m.
In May, another former Spice Girl returned to the fold. Emma Bunton returned to Fuller's 19 Management company after a lacklustre performance. "I wanted people around me who were confident in me to give me that extra push," she told music website Dotmusic. "I've always been in contact with Simon -- we've always texted each other and he was very supportive of my last album."
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