• Lena Headey attends the premiere of HBO's 'Game Of Thrones' Season 6 at TCL Chinese Theatre on April 10, 2016 in Hollywood, California.

Lena Headey attends the premiere of HBO's 'Game Of Thrones' Season 6 at TCL Chinese Theatre on April 10, 2016 in Hollywood, California. (Photo : Getty Images/Alberto E. Rodriguez)

Lena Headey recently channeled her inner Cersei in a custody battle where she appears to have violated a prior agreement. The "Game of Thrones" actress lost her battle to keep her son in the U.K. and was even ordered to shoulder an unexpected cost.

"Game of Thrones" fans would know just how fierce and protective Cersei can be. Portrayed by Headey, the new Queen of the Iron Throne endured many challenges to ensure the safety of her loved ones, as well as the attainment of her goals. Recent events showed that Headey may have similar qualities with her HBO character.

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The British star showed her protective motherly instincts when she decided to keep her son with her in the U.K. The six year old boy is Headey's child with former husband Peter Loughran. The actress even enrolled her son in an England school, a personal preference since she claimed that the U.K. educational system was better than the U.S.

However, Headey was found to have violated a custody agreement where she was expected to have returned her son to the U.S. on Sept. 5. Based on the joint custody agreement, the said trip would have given Loughran his visitation entitlement of 10 days every month.

A court ruling obtained by TMZ revealed a judge's order to have the boy sent back to the U.S. Despite Loughran's demand for his son's immediate return to Los Angeles, the judge approved Headey's request to keep the boy with her until she wraps up "Game of Thrones" Season 7 activities.

In return for the extended custody, the judge ordered Headey to cover her ex-husband's travel costs. Loughran is expected to continue his monthly 10-day visits to see his son in the U.K.

In other news, a special "Game of Thrones" art gallery event will be held in London from Nov. 10 until Nov. 13. The activity will feature sketches from the show's creators, original storyboards and fan-made art work. An HBO press statement obtained by Watchers on the Wall, shared that several jewelry pieces and accessory items used on the show will also be included in the art gallery event.

"Game of Thrones" Season 7 is expected to premiere in summer 2017. Revisit Cersei's wildfire attack in the clip below: