Emilia Clarke has revealed that the real cause behind her hip injury that left her unable to walk without the help of crutches, is a break dance with her "Terminator Genisys" co-star Arnold Schwarzenegger.

The 28-year-old star opened up about the injury while attending a premiere of the science-fiction movie here.

"I fractured my hip break dancing with Arnold Schwarzenegger," she told etonline.com.

When attending the event, Clarke was still aided by crutches.

She also spoke about her experience of playing Sarah Connor, which was originally played by Linda Hamilton in the previous two "Terminator" films.

Asked if she had spoken to Hamilton about the character, Clarke said: "I haven't at all. I just really hope she watches it and likes it."

"Terminator Genisys" releases in India on Friday.