Gillian Anderson has reportedly split from Peter Morgan.

Gillian Anderson

Gillian Anderson

The 'X-Files' actress and the 'Crown' creator are said to have gone their separate ways after four years together but things have stayed amicable between them and they remain "great friends".

According to the Daily Mail newspaper columnist Baz Bamigboye, the former couple felt their relationship had "run its course", with factors in the split including their various work commitments and "family logistics", with Gillian mother to Piper, 26, from her first marriage, and Oscar, 13, and Felix, 12, from another relationship, and Peter dad to five children from his marriage to Lila Schwarzenberg.

The 52-year-old actress played Margaret Thatcher in the latest series of 'The Crown' and recently revealed she had set “very clear boundaries” with Peter to stop their professional relationship impacting on their home life.

She recently: said: “For our own sanity, and actually for the benefit of the relationship, we had very clear boundaries. I am not going to comment on the script, but you are not allowed to comment on the performance!”

Gillian also insisted she had to cast away her own “opinions” of Margaret Thatcher and her “actions” before taking on the role.

She added: “I had to get to a point where it’s nothing to do with my opinions of her policies, of her actions. It is only about her as a human being and her motivation as a politician and as a mother.”

But thankfully, after decades in the business, Gillian has learned how to “compartmentalise” her own life to keep it separate from her work.

She explained: “I’m pretty good at compartmentalising in my life, period. I think I learnt that quite young, being a young mother, in a really intense TV series where it was either full on on-set, or I was in my trailer having to shut the door and no longer be that person but be mum.”