According to IMDb trivia, the actor’s unconventional introduction to producer Garry Marshall earned him the role of Mork, a breakthrough performance that transformed an unknown stand-up comedian into one of television’s brightest new stars.

How One Unforgettable Audition Launched Robin Williams’ Career

Before he became an Oscar winner and one of Hollywood’s most beloved actors, Williams was searching for his first major television role. While auditioning to play the eccentric alien Mork for “Happy Days,” producer Garry Marshall asked him to take a seat. Instead of sitting normally, Williams flipped himself onto the chair, balancing on his head with his feet in the air. The unexpected response immediately stood out, prompting Marshall to later joke that he had cast Williams because he was “the only alien who auditioned.”

The gamble paid off almost instantly. Williams made his screen debut as Mork in the “Happy Days” episode “My Favorite Orkan,” which aired in 1978. Originally intended as a one-time appearance, the character became an immediate audience favorite thanks in large part to Williams’ energetic improvisation and distinctive physical comedy. Producers moved quickly to secure the rising performer before rival studios had the chance.

The overwhelming response to Mork’s debut led ABC to develop “Mork & Mindy,” a spin-off that premiered later that year. Set in Boulder, Colorado, the sitcom followed the well-meaning visitor from the planet Ork as he tried to understand everyday human life with the help of Mindy McConnell, played by Pam Dawber. The series introduced millions of viewers to Williams’ rapid-fire comic style, memorable catchphrases like “Na-Nu Na-Nu,” and his ability to turn even simple scenes into unpredictable performances.

Although “Mork & Mindy” eventually concluded after four seasons, it established Williams as one of television’s most exciting new talents and opened the door to a film career that included “Good Morning, Vietnam,” “Dead Poets Society,” “Mrs. Doubtfire,” “Aladdin,” and “Good Will Hunting.” Looking back, the audition that began with an upside-down chair remains one of Hollywood’s most memorable casting stories and the moment that introduced Robin Williams to the world.