The Crown's Gillian Anderson has split up with the show’s creator Peter Morgan after four years together.

US star Anderson, 52, and Brit Morgan, 57, had recently worked together on the latest season of the popular show based on the Royal Family, where Anderson played former Prime Minister Margaret Thatcher.

The duo’s relationship had ‘run its course’ after struggles with 'work commitments and family logistics,' but remain ‘great friends,’ reports MailOnline. 

Anderson is best known for her roles in The X-Files and in The Fall, and Morgan was nominated for an Oscar for his script for the 2006 movie The Queen, before creating Netflix’s The Crown.

Anderson, who also featured in Sex Education, was married to Clyde Klotz in 1994 and had a daughter Piper the same year, before getting divorced in 1997.  

Seven years later she married filmmaker Julian Ozanne before separating in 2006. During that same year she married businessman Mark Griffiths and they had two children, Oscar, 14, and Felix, 12, before splitting in 2012.

Meanwhile, Morgan married Princess Anna Carolina Schwarzenberg in 1997 before getting divorced in 2014. They have five children together.