British pop star Lily Allen struggles to watch her brother in hit fantasy series Game Of Thrones after a gruesome mutilation scene.

Alfie Allen plays Theon Greyjoy in the small screen adaptation of George R. R. Martin's bestselling books, and male viewers were left squirming during a grisly scene in the third season when he was depicted having his penis cut off.

Now Allen's famous sister has revealed she has found it difficult to tune in to the show ever since, saying, "I love the show and I'm so proud of him but I can't bear the thought of my brother without a penis.

"When he told me it was happening I was fine with it. Then, when I saw it, I just crossed my legs, turned away and tried not to even listen."