'The Crown' star Gillian Anderson and the show's creator, Peter Morgan, have reportedly broken up after dating for 4 years

• "The Crown" creator Peter Morgan and actress Gillian Anderson, who stars in the show's fourth season, have split after dating for four years, columnist Baz Bamigboye reported for the Daily Mail.
• Morgan and Anderson, who started dating in 2016, "remain great friends," Bamigboye wrote for the Daily Mail.
• Anderson stars in the latest season of the Netflix series as the former UK Prime Minister Margaret Thatcher.
• The actress recently told Harper's Bazaar UK and TV Week about how she and Morgan set boundaries for themselves so they wouldn't talk about "The Crown" outside of the set.

Peter Morgan, the creator of the historical drama series "The Crown," and Emmy Award-winning actress Gillian Anderson, who stars in the show's fourth season, have split up after dating for four years, according to a report from the Daily Mail by entertainment columnist Baz Bamigboye.

Morgan and Anderson started dating in 2016, according to the Daily Mail.

"They were supportive of each other's careers. Morgan was often seen at Anderson's first nights, and they would frequently be spotted together on the awards season circuit in Los Angeles and London," wrote Bamigboye for the Daily Mail.

"They remain great friends," Bamigboye added.

E! News confirmed the split and a report from People Magazine cited the Daily Mail, adding that a source described Morgan and Anderson as both having "highly demanding schedules."

Anderson plays former British Prime Minister Margaret Thatcher in the fourth season of Netflix's "The Crown," which premiered in November. The latest season follows the British royal family from the late-1970s through the '90s and portrays Thatcher's rise to power, as well as her relationship with the Queen, which is depicted in the show as tense.

Anderson recently spoke about her relationship with Morgan, telling Harper's Bazaar UK that they had "boundaries" in relation to their involvement with "The Crown."

"For our own sanity, and actually for the benefit of the relationship, we had very clear boundaries," Anderson told the magazine for an article published in November. "I am not going to comment on the script, but you are not allowed to comment on the performance!"

The actress also told TV Week in a November interview that she and Morgan had agreed not to talk about "The Crown" when they weren't on set.

"We made a pact that we weren't going to talk about it at all," Anderson told TV Week. "I wasn't allowed to talk with him or express opinions about the scripts, and he wasn't allowed to express opinions about my performance."

"Somehow we managed to stick to it, which is unbelievable because neither of us can keep from expressing our opinions the rest of the time," Anderson added.

Representatives for "The Crown" on Netflix did not immediately respond to Insider's request for comment.

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