The 35-year-old dance music star is no longer in a relationship with the Lockhart, but he will be involved in the newborn's life, according to the New York Daily News.
Diplo, real name Wesley Pentz, already has a four-year-old son named Lockett with Lockhart.
"She's due in the next couple of weeks... Her friends recently had a baby shower for her. She and Wes aren't together, but he's actively involved in (Lockett's) life," a source said.