Newlyweds Robert Kennedy III and Amaryllis Fox are expected to welcome their first child by the end of the year.

Is the Kennedy clan expanding?

A source told Page Six that the blissfully married couple had "what they called in the old days a 'shotgun wedding.'"

The anonymous source added that the pregnancy is no secret, teasing, "They are both very open about the pregnancy.”

Kennedy III and Fox married at at the Kennedy Compound on Cape Cod last month - and guests reportedly told the outlet that the former CIA spy was pregnant at the time.

Read More: Bobby Kennedy III & former CIA spy Amaryllis Fox say 'I Do' at barefoot beachfront wedding

Those in attendance at the low-key but high profile wedding included multiple generations of the Kennedy family, including matriarch Ethel, and actress Susan Sarandon as well as the Swedish Prime Minister Stefan Lofven.

Fox has one eight-year-old daughter, Zoe, from her previous marriage. 

The New York-born and Oxford graduated Fox worked for the CIA in 16 countries in Africa and Asia before leaving her role in the government back in 2010. She is reportedly an expert in computer coding and helped the government to develop a formula of sorts to predict terrorist activity.

Robert (Bobby) III, the son of Robert F. Kennedy Jr, is a film actor.