Musician Jeymes Samuel, who is singer and producer for the band The Bullitts, tweeted that he and the legendary rapper are "working tirelessly on the score for the upcoming #CLASSIC The Great Gatsby."
The film's official composer is Craig Armstrong ("Moulin Rouge," "Love Actually," "Ray"), so the extent of Jay-Z and Samuel's musical contribution remains to be seen.
"The Great Gatsby" may have box office woes upon its May 10 release. The film was originally slated to hit theaters this past December, but Warner Bros. opted to pull it out of the line of Oscar fire. Instead it will contend with fanboy tentpoles.