Mircea Oprean, a son-in-law of the couple, said the family will finally learn if the Ceausescus were buried in the Ghencea graveyard following their execution, The Daily Telegraph reported.
"Today, the corpses will be exhumed in order to get samples for DNA testing," Oprean said. "We have to know if it is really them who are buried there."
Oprean was married to Ceausescu's late daughter, Zoe.
Ceausescu's children have expressed doubts their parents were actually buried in Ghencea, charging there is a lack of paperwork.
The couple were buried in the dead of night with false names on their crosses to prevent vandals from locating their graves.
Ceausescu and his wife were executed Dec. 25, 1989, following the fall of Romania's communist regime.