The Academy of Motion Picture Arts and Sciences voted to “immediately expel” Harvey Weinstein during an emergency session held Saturday.
In a statement, the academy said the vote was “well in excess of the required two-thirds majority.”
It added, “We do so not simply to separate ourselves from someone who does not merit the respect of his colleagues but also to send a message that the era of willful ignorance and shameful complicity in sexually predatory behavior and workplace harassment in our industry is over. What’s at issue here is a deeply troubling problem that has no place in our society.”
The academy said it would “work to establish ethical standards of conduct that all academy members will be expected to exemplify.”
Mr. Weinstein, who was fired by the movie and television studio he co-founded, the Weinstein Company, has denied rape allegations while acknowledging that his behavior “caused a lot of pain.”
Although largely symbolic, the ouster of Mr. Weinstein from the roughly 8,400-member academy is stunning because the organization is not known to have taken such action before — not when Roman Polanski, a member, pleaded guilty in a sex crime case involving a 13-year-old girl; not when women came forward to accuse Bill Cosby, a member, of sexual assault; and not when Mel Gibson went on anti-Semitic tirade during a drunken-driving arrest in 2006 or pleaded no contest to a charge of battery against an old girlfriend in 2011.
Now, the academy may be forced to contend with other problem members.
Scott Feinberg, the longtime awards columnist for The Hollywood Reporter, said, “This may well be the beginning of a very tough chapter for the academy. The next thing that is going to happen, rightly or wrongly, is that a wide variety of constituencies are going to demand that the academy similarly address other problematic members.”
Mr. Feinberg added that he was speaking of academy members like Mr. Polanski and Stephen Collins, the “7th Heaven” actor who admitted in 2014that he molested teenage girls in past decades, which resulted in police investigations in New York and Los Angeles but no charges.
Before Mr. Weinstein — who built two studios on the back of the Academy Awards, securing more than 300 nominations for his movies — only one person was known to have been permanently expelled from the academy. Carmine Caridi, a character actor, had his membership revoked in 2004 for violating an academy rule involving Oscar voting. He got caught lending DVD screeners of contending films; copies ended up online. (In the 1990s, a couple of people were temporarily suspended for selling their allotted tickets to the Oscar ceremony.)
The academy’s board, roughly 40 percent female, includes Hollywood titans like Steven Spielberg, Whoopi Goldberg, the Lucasfilm chief Kathleen Kennedy, Tom Hanks, the documentarian Rory Kennedy and Jim Gianopulos, the chairman of Paramount Pictures.
In an example of Mr. Weinstein’s reach, at least 10 governors have worked on films that he produced or that his studios have released. One board member, Christina Kounelias, now an executive vice president at Participant Media, started her career at Miramax, working in publicity for four years.
The board’s president is John Bailey, a cinematographer whose credits include “Ordinary People,” a winner of the 1981 Academy Award for best picture, and “Groundhog Day.” Lois Burwell, who is listed as its first vice president, is a makeup artist who won an Oscar in 1996 for her work on “Braveheart.”
The meeting of the board was called on Wednesday. In the days leading up to it, as the industry was grappling with new public accusations against Mr. Weinstein published in The New Yorker, The Times and on social media, some board members spoke among themselves to see if they could reach an informal consensus on how a vote on the mogul’s status would go.
Kathleen Kennedy, an eight-time Oscar nominee, told fellow board members that she was outraged by the allegations, according to a person briefed on advance discussions, who spoke on the condition of anonymity to comply with academy confidentiality strictures. But Ms. Kennedy was also said to be aware that pushing him out could put the academy on a slippery slope.
The Saturday meeting began at 10 a.m. and lasted until roughly 12:30 p.m. It was held inside a colossal conference room on the seventh floor of the academy’s mirrored-glass tower on Wilshire Boulevard in Beverly Hills. As with all academy board meetings, voting was anonymous. Some participants participated via speakerphone. Coffee and fruit were available.
The discussion was largely contained to Mr. Weinstein, according to two people there, but the board spent some time talking about the implications of censuring him. Mr. Polanski was one name mentioned.
In addition to the seriousness and plenitude of the allegations against Mr. Weinstein, the board concentrated on workplace abuse. Mr. Weinstein often used the pretext of meetings — casting sessions, script discussions — to lure women to hotel rooms, The Times and New Yorker investigations found.