Awlaki, a U.S.-born Yemeni cleric, was killed Sept. 30, 2011, in a drone strike in Yemen.
ABC News, citing a report in the Danish newspaper Jyllands-Posten, said the CIA recruited Morten Storm, a Danish Muslim, as a double-agent.
Storm was close to Awlaki, who asked the Dane to find him a European woman to be his third wife, the report said Monday. Storm told Jyllands-Posten in 2010 he found a match, a 32-year-old Croatian named Aminah, who contacted him on Facebook to express her interest in marrying Awlaki, it said.
The marriage was arranged through a series of Facebook videos between the two, with Storm acting as intermediary, the report said.
The CIA had asked Storm to give the woman a suitcase with a tracking device that would give the U.S. Air Force a location for a drone strike. The plot was foiled when the woman ditched the suitcase, ABC reported.