EXCLUSIVE: I’ve just learned that five well-known Hollywood Democrats — David Geffen, Bob Iger, Peter Chernin, Haim Saban, and Ari Emanuel — are hosting a November 4th fundraiser for Ari’s brother Rahm Emanuel in his bid to become Chicago’s next mayor. Rahm, a former Democratic U.S. Representative from Illinois’ 5th Congressional District (2003-2009), resigned as President Obama’s White House Chief Of Staff on October 1st to throw his hat into the mayoral race following the retirement of Richard M. Daley whose last name more or less owned that political office the way most families would takeover the dining table. The Hollywood fundraiser will be held at Saban’s palatial Beverly Hills home.

For those keeping score, Geffen is the former DreamWorks SKG partner and longtime music and film mogul. Iger is the CEO of the Walt Disney Company. Chernin is the former No. 2 of Rupert Murdoch’s News Corp and now a busy Fox TV and film producer. Saban is a private equity investor and entertainment producer best known for making the Power rangers into a worldwide hit and co-owner of the largest Spanish language media company in the U.S., Univision, as well as one of the Democratic party’s single largest donors. And Ari is the co-CEO of WME Entertainment, one of the largest Hollywood talent and literary agencies and now expanding into marketing and investment banking. All the men are Democratic Party donors, with Geffen, Chernin, Ari Emanuel, and Saban the most politically active, and Geffen and Saban over the years among the party’s biggest single donors.

Because of his brother and because of his Democratic Party fundraising, Rahm knows all the major Hollywood players who are active in politics very well. Rahm was chair of the Democratic Congressional Campaign Committee during the 2006 mid-term elections and was elected chairman of the Democratic caucus when the party regained control of the U.S. House Of Representatives that year. He remained a top strategist for House Democrats during the 2008 cycle while he worked on behalf of Obama’s presidential candidacy. Two days after Obama’s election win, Rahm was tapped for White House Chief of Staff.

Editor-in-Chief Nikki Finke - tip her here.