Heh. Yeah. I actually read a Regency romance where a peripheral character was going to attempt to court Princess Charlotte, and went nosing around in Wikipedia. George IV did have one daughter (Charlotte) even though he claimed that he and Caroline of Brunswick only had sex three times. Heh.

It was actually Charlotte that had trouble conceiving an heir. She had two miscarriages and died shortly after giving birth to a stillborn son. George IV's younger brother William succeeded him, and eventually, Victoria succeeded William.