The life story of Arnon Milchan, billionaire Hollywood mogul and undercover agent, may have been made for the silver display: He produced blockbusters like “Fairly Girl,” “Mr. & Mrs. Smith” and “Bohemian Rhapsody,” and likewise made a fortune from arms dealing, together with covert exploits procuring weapons for Israel, his native nation.

A decade in the past, he went public about his work for Israeli intelligence, touchdown himself in a spot of hassle. The federal government of the US, the place he had lengthy been resident, balked at renewing his 10-year visa after revelations he and others made about one in all his corporations’ unlawful export from the US to Israel within the Nineteen Eighties of gadgets that would function nuclear triggers.

However a longstanding relationship he had with Benjamin Netanyahu, then and as soon as once more the Israeli prime minister, proved to be helpful.

Mr. Netanyahu efficiently lobbied senior American officers on Mr. Milchan’s behalf to reinstate his visa, in line with an Israeli indictment towards Mr. Netanyahu.

On Sunday, Mr. Milchan will take the stand in court docket as a star prosecution witness towards Mr. Netanyahu, who’s on trial in three separate however interlocking corruption instances. In a single, he has been charged with breach of belief over his dealings with Mr. Milchan.

Amongst different issues, Mr. Netanyahu has been accused of intervening twice with U.S. officers to safe Mr. Milchan’s visa as a part of a gifts-for-favors affair identified in Israel as Case 1000.

In keeping with prosecutors, Mr. Milchan lavished Mr. Netanyahu and his spouse, Sara, with items price a whole lot of hundreds of {dollars}.

Most of these items have been costly cigars and pink Champagne delivered to the prime minister’s official residence in Jerusalem and his personal family within the seaside city of Caesarea — usually on demand, in line with testimony in court docket from Mr. Milchan’s private assistant and his driver. From time to time, Ms. Netanyahu acquired jewellery too.

Mr. Netanyahu insists there’s nothing unlawful about accepting items from an outdated good friend and has denied all wrongdoing. Whether it is discovered that receiving these items created a battle of curiosity, he may find yourself serving jail time. Mr. Milchan has not been charged with any crime.

The trial has became a showcase of the mutually helpful nexus of cash, energy and affect in Israel that acquaintances of Mr. Milchan say he thrived in.

“Arnon is an individual who’s at all times anxious to be on the focal point,” mentioned Ehud Olmert, a former Israeli prime minister who has identified Mr. Milchan for many years. “He must be the mover and fixer. He approaches people who find themselves able of affect — he made an effort to come back near you if you happen to have been an individual of consequence.”

Mr. Olmert mentioned that after he resigned from workplace below a cloud, the Hollywood producer dropped him as a good friend.

“As soon as you aren’t on the middle of occasions you aren’t that attention-grabbing,” mentioned Mr. Olmert, who was finally convicted of bribery and served a jail time period in a case unrelated to Mr. Milchan.

Mr. Milchan, 78, owns an property within the upmarket village of Beit Yanai overlooking the Mediterranean, in addition to different property in Israel.

However he has refused to testify in individual in an Israeli court docket, and can accomplish that by video convention from Brighton, England, close to the place he’s residing.

His legal professionals just lately cited medical causes for his refusal to journey to Israel. In keeping with court docket paperwork, Mr. Milchan has not set foot there for no less than six years, since he was interrogated by the Israeli police investigating Mr. Netanyahu’s corruption case.

At one level within the investigation, Mr. Milchan turned a suspect in what the police seen as a possible bribery case. However Israel’s lawyer normal discovered no grounds to cost him.

Mr. Milchan’s representatives declined to reply questions, as an alternative offering a press release emphasizing that Mr. Milchan was “showing solely as a witness and isn’t suspected of any wrongdoing” and would “cooperate as a lot as vital.”

“Milchan is the important thing witness in Case 1000,” Tamar Almog, the authorized affairs analyst for Kan, Israel’s public broadcaster, mentioned in an interview. “His testimony is essential for understanding the connection between the 2 males, and if it was a system, as described within the indictment,” she mentioned, referring to allegations of a gifts-for-favors association.

Mr. Netanyahu can also be accused of favoring Mr. Milchan by pushing for a tax exemption to be prolonged and for a telecoms merger that prosecutors say would have secured an funding alternative for him.

Mr. Netanyahu’s decided efforts to get Mr. Milchan’s 10-year visa renewed concerned no less than two pressing calls to then Secretary of State John Kerry, in line with an individual with information of the conversations who spoke on the situation of anonymity to be able to talk about personal communications.

Mr. Netanyahu has argued that he was certain to assist Mr. Milchan together with his visa due to his contributions to Israeli safety and to the American economic system.

Born in 1944 in Rehovot, in what would turn into the state of Israel 4 years later, Mr. Milchan inherited his father’s failing fertilizer enterprise and turned it right into a multimillion-dollar agrochemical firm. Forbes estimates his internet price at about $3.3 billion. He’s married to Amanda Coetzer, a South African former skilled tennis participant.

From testimony given in court docket final 12 months by Hadas Klein, Mr. Milchan’s longtime private assistant in Israel, an image emerged of a person who counted his pennies and was more and more involved in regards to the expense and legality of offering the Netanyahus with a gradual provide of luxurious items.

Ms. Klein and the motive force would normally ship the Champagne and Mr. Milchan would deliver the containers of cigars in a shoulder bag, Ms. Klein mentioned.

Mr. Milchan would ask associates who have been touring to purchase him duty-free cigars, hoping to economize, Ms. Klein testified, and at one level he tried to purchase a less expensive model for Mr. Netanyahu, she mentioned, till Mr. Netanyahu complained about them.

In keeping with the indictment, the private relationship between Mr. Milchan and Mr. Netanyahu dated to 1999 and the gift-giving lasted from 2011 to 2016.

Mr. Milchan liked having an open door and an open line to the Netanyahus, Ms. Klein mentioned in court docket, including, “He liked saying he was associates with the prime minister.” However he was relieved, she testified, when, in 2014, James Packer, an Australian billionaire who admired Mr. Netanyahu, started to share the price of the cigars and Champagne.

Mr. Milchan’s work for Israeli intelligence was first made public in an unofficial biography, “Confidential: The Lifetime of Secret Agent Turned Hollywood Tycoon Arnon Milchan,” written by Meir Doron and Joseph Gelman, and printed in 2011. The guide revealed that no less than by the mid-Nineteen Eighties Mr. Milchan was a full-fledged operative for Lakam, Israeli intelligence’s now defunct Science Liaison Bureau.

Mr. Milchan, the guide mentioned, supervised government-backed accounts and entrance corporations that financed covert Israeli operations exterior the nation, together with shopping for parts to construct and preserve Israel’s nuclear arsenal.

Mr. Milchan has mentioned he was not conscious that the parts have been being exported with out the required licenses and has not been accused of wrongdoing.

However he appeared intent on dispelling his picture as an arms vendor who profited from massive commissions in his transactions with Israel.

In 2013, he appeared in a well-liked Israeli documentary program and bragged about his contributions to Israeli safety, ranging from when he was recruited within the Nineteen Sixties.

“Have you learnt what it’s to be a child of 20-something, and the nation lets him be James Bond?” he mentioned. “Wow. That’s motion, that’s thrilling.”

Flying the present’s host round in a non-public jet and giving her a tour of his art-filled Malibu mansion, he insisted that the commissions he made went again to Israel and mentioned he had repeatedly risked his life for his nation.

Mr. Olmert, the previous Israeli prime minister, mentioned of Mr. Milchan, “He has nice love for Israel. However to say he was requested to threat his life is to take it one step past actuality.”

Myra Noveck contributed reporting.