Julia Roberts crashed George Clooney’s appearance on Jimmy Kimmel Live! and it couldn’t have been funnier

Jimmy Kimmel Live! viewers were treated to a hilarious, blink-and-you'll-miss-it cameo by Julia Roberts while the host was interviewing the actress' friend, George Clooney.

George, who recently revealed how he was able to keep the romance alive with his wife Amal in lockdown, was on the show to promote his latest film, The Tender Bar, which he directed. 

Already out in theaters and set to hit Amazon Prime Video on January 7, the movie is based on the eponymous coming-of-age 2005 memoir by J. R. Moehringer, which tells the story of the author's upbringing on Long Island, in New York. 

The stellar cast includes Ben Affleck as Charlie Moehringer, the protagonist's uncle, and Christopher Lloyd as his grandfather, among other stars. The main character is played by three different actors—Daniel Ranieri as a young J.R. Moehringer, Tye Sheridan as his present version and Ron Livingston as future J.R.

Ten-year-old Daniel was also on Jimmy Kimmel Live! with George, appearing virtually, when the host introduced the director to the audience. Chatting from Australia, where he is currently filming a rom-com called Ticket to Paradise with Julia, George began singing the praises of Daniel when, suddenly, a chic-looking Julia appeared alongside him donning black shades.

"Holy moly!," Jimmy said. "George, I don't know if you're aware of this but the woman sitting next to you... There's a woman sitting next to you!" Playing his part, George looked around dumbfounded, seemingly completely missing his pal, who didn’t make any further appearances during the interview. 

"Maybe I hallucinated that. Wow. It sure looked like Julia Roberts though," Jimmy added towards the end of the clip.

As fans know, George and Julia have been longtime friends, having appeared in countless movies together—from the Ocean's Eleven franchise to 2016's Money Monster, their last collaboration before the upcoming Ticket to Paradise, set to premiere in 2022.

As for how they met back in the day, the duo discussed just that in a 2014 Vanity Fair interview. "The Chateau Marmont. We had long been reported best friends and we had never met before!" said Julia at the time. "That's true. This was for Ocean's [Eleven] and I think it was 2000," confirmed George.