Clegg, who was previously a marketing manager at the music and theatre division of Clear Channel Entertainment, will also be charged with building commercial and advertiser relationships.
Popworld, the brainchild of Fuller and managing director Robert Dodds, launched as a music, fashion and celebrity web site targeting eight- to 16-year-olds in 2000. Later that year, Channel 4 bought a 10% stake and began broadcasting Popworld-branded programming on E4 and the T4 strand.
In 2001 it inked a deal with Associated Newspapers to publish Popworld the Magazine as a supplement with the Mail on Sunday, but this was suspended two months ago in order to enable the company to "explore other opportunities", said Clegg.
Clegg confirmed the brand wanted to re-establish a presence in print media, and was also looking at radio and other TV platforms.