Rob Reiner finds the idea of a Donald Trump presidency inconceivable.
During a candid interview with AOL Build on Wednesday, the famed "Princess Bride" director railed against the prospects of the billionaire businessman taking the White House, calling the 2016 election "the most bizarre political cycle" he's ever experienced.
According to Reiner there is a clear explanation for Trump's political success. "The only reason anybody pays any attention to this guy is because he's famous."
Click through images of celebrity endorsements for Hillary Clinton:
Important people who support Hillary Clinton (Politicians, famous figures, other celebs)
Director Rob Reiner rips into 'crackpot' Donald Trump
Warren Buffett, chairman and chief executive officer of Berkshire Hathaway Inc., smiles during an event with Hillary Clinton, former Secretary of State and 2016 Democratic presidential candidate, in Omaha, Nebraska, U.S., on Wednesday, Dec. 16, 2015. Buffet said at the rally that he was supporting Clinton's bid for president because they share a commitment to help the less affluent. (Photographer: Daniel Acker/Bloomberg via Getty Images)
Governor Jerry Brown, seen here with then-candidate Bill Clinton in 1992, notoriously did not like the Clintons for years, but announced a week before the California primary that he would back Hillary Clinton. (Photo by Cynthia Johnson/Getty)
Actor Leonardo DiCaprio, seen here at the 2016 Vanity Fair Oscar Party, hasn't formally endorsed Hillary Clinton but he has donated $2700 to her campaign and backed her in 2008. (Photo by Axelle/Bauer-Griffin/FilmMagic)
Walter Mondale was the first former Democratic vice president to endorse Clinton (REUTERS/Craig Lassig)
Rep. John Lewis, D-Ga., has been an early Clinton backer, seen here at a 'Super Tuesday' watch party her campaign in Atlanta, Ga., March 1, 2016. He is famous for his work fighting for civil rights alongside Dr. Martin Luther King Jr. (Photo By Tom Williams/CQ Roll Call)
LEBANON, NH - JANUARY 09: Former U.S. Women's National Soccer Team captain Abby Wambach smiles while she is introduced to a crowd at a Hillary Clinton campaign office on January 9, 2016 in Lebanon, New Hampshire. Wambach highlighted Democratic presidential candidate Hillary Clinton's commitment to standing up for women and girls. (Photo by Scott Eisen/Getty Images)
Singer Demi Lovato, seen here onstage at WE Day California 2016, is a Clinton supporter. (Photo by Mike Windle/Getty Images for WE Day )
Actress and screenwriter Lena Dunham campaigns for U.S. Democratic presidential candidate Hillary Clinton at Eight Seven Central screen printers in Des Moines, Iowa, January 9, 2016. REUTERS/Brian C. Frank
Singer Katy Perry, center, holds a sign in support of Hillary Clinton, former U.S. secretary of state and 2016 Democratic presidential candidate, as Clinton speaks at the Jefferson-Jackson Dinner in Des Moines, Iowa, U.S., on Saturday, Oct. 24, 2015. With Vice President Joe Biden officially out of the presidential race, the nation's first nominating contest between front-runner Clinton and Senator Bernie Sanders is gaining steam, according to a new Bloomberg Politics/Des Moines Register Iowa Poll. Photographer: Daniel Acker/Bloomberg via Getty Images
Senate Minority Leader Harry Reid, seen here working with Clinton when they were Senate colleagues, was an early supporter of the former secretary of state. (REUTERS/William Philpott WP/SV)
Actress Kerry Washington, seen here at a 30th anniversary presentation at the 2015 Film Independent Spirit Awards, is a Clinton supporter. (Adrees Latif / Reuters)
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"If you took any person and you had them say the things that he says all the time--ban Muslims, Latinos are all rapists and throw 12 million of them out, the way he talks about women, the way he says we will bring back torture, give nuclear weapons to South Korea and Japan," Reiner continued, "if he was not a famous person he would be some crazy crackpot in the park."
"I believe we'll win, I believe Hillary will beat him."
Reiner went on to criticize the presumptive Republican nominee for "welcoming with open arms" members of the KKK and white supremacist groups. "We can not have a person like this," Reiner said.
While the Emmy-winning director did not outright endorse Hillary Clinton for president, he did make his allegiance known heading into November's general election.
"I believe we'll win, I believe Hillary will beat him," he said.
However, Reiner's optimistic message came with a caveat. "If she doesn't win in a landslide," Reiner continued, "than I think it's a very sad day."