When people think of the legendary sitcom Seinfeld, certain faces immediately spring to mind: Jerry Seinfeld’s wry grin, Julia Louis-Dreyfus’s energetic Elaine, Michael Richards’s eccentric Kramer, and, of course, Jason Alexander’s neurotic yet lovable George Costanza. But what if things had turned out differently? What if George, one of television’s most iconic characters, had been played by someone else entirely?
On a recent episode of his podcast, Really? no, Really?, Jason Alexander pulled back the curtain on the casting process that shaped his career and, arguably, the very DNA of '90s television. Joined by co-host Peter Tilden and special guest Jennifer Keishin Armstrong—author of the 2016 book Seinfeldia—Alexander recounted the surprising roster of actors who nearly landed the role of George Costanza. According to People, Alexander revealed, “I know some of the people that they either offered the role to or—so, I know about Chris Rock. I know about Danny DeVito. I know about Paul Schaefer. And I know about, um, Rosie O'Donnell.”
It’s a list that reads like a who’s who of comedy and entertainment. Chris Rock, at the time a rising stand-up star, was in the mix. Danny DeVito, already a household name thanks to Taxi and his distinctive comedic style, was also considered. Paul Schaefer, best known as David Letterman’s musical sidekick, and Rosie O’Donnell, who would later become a talk show powerhouse, rounded out the group.
But the surprises didn’t stop there. When Alexander asked Armstrong if there were any other notable contenders, she replied, “The only other one that I remember because it was so off the beaten path was Buscemi—Steve Buscemi.” The thought of Buscemi, with his unique energy and offbeat charm, as George Costanza is enough to make any fan pause. Armstrong, according to Closer Weekly, admitted that while audiences love these alternative casting stories, “they are also the hardest to verify.” She explained, “Some people will tell you like they’re honest, and Chris Rock will be like, ‘Yeah, sure. I was up for that.’ Other people get a little embarrassed. And then I think there’s a third category of people who don’t maybe know or remember that they were up for—‘up for’ is real slippery.”
Armstrong’s research for her book illuminated the sometimes murky waters of Hollywood casting. “It’s more just like people being like, ‘I’m pretty sure we were thinking about Rosie O’Donnell,’” she said. The process, it seems, is as much about memory and myth as it is about hard and fast facts. Still, the idea that so many comedic heavyweights were considered for George Costanza underscores just how pivotal the role was, even before Seinfeld became a runaway hit.
Of course, the story of Seinfeld’s casting doesn’t end with George. According to Marie Claire, Jerry Seinfeld himself revealed on The Howard Stern Show that Rosie O’Donnell actually auditioned for the part of Elaine Benes—a role that ultimately went to Julia Louis-Dreyfus, whose performance became one of the show’s defining elements. It’s hard to imagine anyone but Louis-Dreyfus as Elaine, just as it’s now nearly impossible to picture George Costanza as anyone but Jason Alexander.
The journey to the final cast was, in many ways, a microcosm of the show’s quirky, unpredictable spirit. Seinfeld premiered in 1989, co-created by Jerry Seinfeld and Larry David, and ran until 1998. The “show about nothing” became a cultural touchstone, renowned for its relatable depiction of everyday absurdities and its razor-sharp wit. Centered around a fictionalized version of Jerry Seinfeld and his friends in Manhattan, the sitcom offered a fresh, irreverent look at city life and friendship.
Alexander’s own path to George Costanza was far from guaranteed. He and actor Larry Miller auditioned for the role at the same time, and Alexander admitted he initially thought Miller would get the part, especially given Miller’s friendship with Jerry Seinfeld. But fate—and perhaps a bit of serendipity—had other plans. Alexander stepped into George’s shoes and, over the course of nine seasons, helped craft a character who was as exasperating as he was endearing.
The chemistry among the core cast—Seinfeld, Louis-Dreyfus, Alexander, and Richards—proved to be lightning in a bottle. Their dynamic was so compelling that, years after the show’s finale, fans clamored for a reunion. That wish was granted in season seven of Larry David’s HBO comedy series Curb Your Enthusiasm, which brought the cast back together for a meta, tongue-in-cheek storyline.
Reflecting on the reunion in the 2025 book No Lessons Learned: The Making of Curb Your Enthusiasm as Told by Larry David and the Cast and Crew, Alexander confessed to having initial reservations. “Initially, I had concerns that a reunion show wouldn’t be a good thing to do, or a fun thing to do. We hadn’t worked as a group in 10 years. So we’re all 10 years older,” he said. “So the first thing I’m thinking is, ‘What was barely charming on characters in their 30s and 40s may be completely devoid of charm in their 40s and 50s, and that may be a mistake.’”
Despite these doubts, the experience turned out to be a positive one. “The ensemble feeling that we had, the affection that we had for each other, it was immediate,” Alexander recalled. Being back on set, he said, felt like “a time tunnel.” The camaraderie that defined Seinfeld in its heyday was still very much alive, a testament to the enduring bond among the cast.
Looking back, it’s clear that the casting of Seinfeld was a delicate alchemy—one that could have turned out very differently. Had Chris Rock, Danny DeVito, or Steve Buscemi stepped into George’s neurotic world, the landscape of American television comedy might look very different today. These “what ifs” are tantalizing, but for fans, the magic of the original cast—and the stories behind their selection—only adds to the show’s enduring appeal.
As the world continues to revisit and reimagine the stories of classic television, the alternate histories of shows like Seinfeld remind us that even the smallest decisions can have ripple effects lasting decades. For Jason Alexander and his fellow castmates, the journey from audition room uncertainty to sitcom immortality is a story as rich and unpredictable as anything ever penned by Larry David.