Theo, 25, and Sasha, 23, are deejays. They released their Brother/Sister EP earlier this year as Wardell.
In addition to her music career, Sasha sold the pilot "Girls Without Boys" to ABC, according to hollywoodreporter.com.
"But music is still my passion," Sasha said to the site. "I am going to find a way to balance both."
Other acts signed to Roc Nation’s management roster have also included Meek Mill, Wale, DJ Mustard, Timbaland, among others.
Roc Nation Sports’ roster includes Oklahoma City Thunder forward Kevin Durant, New York Jets quarterback Geno Smith, New York Yankees second baseman Robinson Cano and Tulsa Shock guard Skylar Diggins. The Shock is an WNBA franchise.
Steven Spielberg is one of the most acclaimed writers, producers and directors in Hollywood. He has directed Lincoln, Catch Me If You Can and Saving Private Ryan, as well as the Indiana Jones franchise, among others.