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GOP front-runner Donald Trump will be on Staten Island on Sunday for a brunch, which has sold out. (AP Photo/Mike Groll)

STATEN ISLAND, N.Y. - A Republican brunch on Sunday where Donald Trump will be a guest speaker has sold out, according to the event's organizer.

The GOP front-runner will speak at the Staten Island Republican County Committee's annual Lincoln Day brunch at the Hilton Garden Inn in Bloomfield.

GOP Chair John Antoniello said the 900-ticket event sold out after it was opened to the public last Sunday.

Tickets to the $150-person event are typically only purchased by the local politically involved but Trump's appearance there made it a hot-ticket item.

Attendees from past years said typically a few hundred people attend.

Antoniello said both Texas Sen. Ted Cruz and Ohio Gov. John Kasich have both been invited but haven't said they will attend.

All three GOP candidates will be in Manhattan on Thursday for the annual gala of the state Republican Party.

Staten Islanders were directed to http://www.silincolnbrunch.com beginning Sunday to buy tickets, and a message this week indicates all tickets have been purchased but more may become available.

A message on the site reads, "Our online box office is currently closed while we work to accommodate the overwhelming response to our Lincoln Day brunch. Please check back later in the day. After we finalize our guest count there is a possibility that more tickets may become available."

Trump has garnered much support on the Island, including among elected officials.

Councilman Joe Borelli has endorsed the candidate and is one of the co-chairs of his campaign in New York.

Antoniello has also endorsed Trump, as has former Councilman Vincent Ignizio and candidate for Assembly, Ron Castorina Jr.

Rep. Daniel Donovan has said he will endorse whoever wins the GOP nomination, as has Borough President James Oddo and Councilman Steven Matteo.