Credit: Alexandra Wyman/

Frank Potenza, a former police officer who became a frequent guest on his nephew Jimmy Kimmel's late-night talk show, died Tuesday morning at the age of 77.

"Thank you for your kind words about a very kind man -- my Uncle Frank -- who passed away this morning," Kimmel, 43, tweeted.

Prior to appearing on ABC's Jimmy Kimmel Live!, Potenza was a Korean War veteran who worked 20 years as a New York City police officer. The New York native also spent 20 years as a security guard at Caesar's Palace in Las Vegas and at St. Patrick's Cathedral in New York.

In a statement to The Washington Post, the show said Potenza was "beloved by his coworkers and considered an uncle to all. His kindness and humor will be missed by everyone he touched."

Potenza is survived by his three daughters and a newborn granddaughter. Funeral plans were not released.