Evan Ross, Ashlee Simpson

Evan Ross, Ashlee Simpson

This Nov. 12, 2013 file photo shows Evan Ross, left, and Ashlee Simpson at the “Bandfuse: Rock Legends” video game launch in Los Angeles. Simpson is engaged to boyfriend Evan Ross, who is the son of Diana Ross. The pair announced the news on Twitter Monday, Jan. 13, 2014, confirmed Simpson’s publicist Janet Ringwood. Simpson was previously married to Fall Out Boy bassist Pete Wentz. They have a five-year-old son named Bronx. Ross is an actor who will appear in the final two installments of “The Hunger Games.” (Photo by Richard Shotwell/Invision/AP, File)

FILE – This Nov. 12, 2013 file photo shows Evan Ross, left, and Ashlee Simpson at the “Bandfuse: Rock Legends” video game launch in Los Angeles. Simpson is engaged to boyfriend Evan Ross, who is the son of Diana Ross. The pair announced the news on Twitter Monday, Jan. 13, 2014, confirmed Simpson’s publicist Janet Ringwood. Simpson was previously married to Fall Out Boy bassist Pete Wentz. They have a five-year-old son named Bronx. Ross is an actor who will appear in the final two installments of “The Hunger Games.” (Photo by Richard Shotwell/Invision/AP, File)