Arnold Schwarzenegger is making a big-screen comeback with a lead role in a new movie, Last Stand, only two months after it emerged that he had a love child with his housekeeper.

Terminator star Schwarzenegger will play the lead in the old-style Western film, Last Stand, directed by Kim Ji-Woon, about a sheriff trying to stop a drug-cartel leader.

A studio insider told Deadline: “It's an old-fashioned Western specifically designed for a 63-year-old broken-down guy with a moral decision whether Arnold decides to stand up for his town. We always needed an iconic figure for it.”

He added that film bosses believe Arnie still has it in him to be a star. The source said: “I can tell you from The Expendables [the actor had a cameo in the Sylvester Stallone movie] it was electrifying when Arnold came on. He is still a big piece of news.”

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Schwarzenegger left Hollywood for politics eight years ago but spoke about a comeback as the end of his final term as Governor approached.

Rumours of a Terminator 5 surfaced in April, but plans were shelved and the 63-year-old actor decided to focus on his personal life following the revelation that he had a love child with housekeeper Mildred Baena, within days of the birth of his son Patrick.

Schwarzenegger’s divorce from his wife, Maria Shriver is now underway and filming for Last Stand is set to start in September.