Brian Cox and his wife, Nicole Ansari-Cox, have been married for 24 years and maintain a "good creative relationship" by living in separate homes. The couple live in the same Primrose Hill neighborhood of London and have separate bedrooms at their homes in New York City and upstate New York. Cox also revealed that they regularly attend couples counseling and maintain their relationship. During an interview with the Times, Cox expressed his desire to stay in good shape ahead of his 80th birthday.