Rodman spent an evening dining with Kim and his wife, Ri Sol Ju, while in Pyongyang, and may have learned a major state secret during the meal.
"[Ri] kept talking about their beautiful baby daughter," Rodman told the Sun.
The oddball basketballer didn't seem to realize that the Korean succession is of critical -- and hush-hush -- importance to Kim's regime, even though he was aware of the dictator's demand for secrecy.
"I won't tell you if the toilets were made of gold or anything like that, as I promised Kim I wouldn't talk about that stuff," Rodman said. "There is a lot of stuff I can't talk to you about."
Rodman's slip is the latest in clues that the North Korean leader is in fact a dad, although experts said if it had been a son, the family would have trumpeted the birth.
A video on Korean state TV in December appeared to show Ri heavily pregnant, although she appeared shortly after with her usual slim figure.