Foy played Queen Elizabeth in the drama and earned a Golden Globe, SAG Award and Emmy nomination, among other accolades, for the part.
During a panel discussion for the series at the INTV Conference in Jerusalem on Tuesday, Crown producers Suzanne Mackie and Andy Harries were asked if star Claire Foy (Queen Elizabeth) was paid more than co-star Matt Smith, who played Elizabeth's husband, Prince Philip.
The pay difference was due to Smith coming into the show after a six-year stint as Dr. Who on television - one of Britain's most popular shows, the producers said.
Foy, 33, was reportedly paid $40,000 (£28,000) per episode for the first two series, which portrayed the Queen in the 1950s and 1960s. They did not give details of the gap.
Foy, however, will not be reprising her role as Queen Elizabeth.
Not even the Queen is getting an equal slice of the pie but producers of The Crown say they will put that right next season.
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Speaking at this week's Mencap charity fashion show, in London, Olivia added: "I don't know who will play Prince Phillip yet".
At this time, representatives for Foy and Smith have not commented while Netflix declined to address the shocking pay discrepancy. The Crown costs $7 (€5.6) million an episode to produce.
The ongoing disparity between men and women is reflected in annual lists published by Forbes magazine.
One human is not simply worth more than another; we should be paid for the job we do.
Executive producer Susie Mackie has vowed to end the gender pay gap.
Actress Michelle Williams was revealed earlier this year to have been paid a fraction of what her co-star earned for re-shooting scenes in All The Money In The World after Kevin Spacey was replaced by Christopher Plummer.