George Clooney Photobombs Steven Spielberg and Jerry Seinfeld: Picture

George Clooney, Steven Spielberg, Jerry and Jessica Seinfeld
George Clooney photobombs Steven Spielberg, Jessica Seinfeld and Jerry Seinfeld at the USC Shoah Foundation Institute 2013 Ambassadors for Humanity gala in NYC on Friday, Oct. 3 Larry Busacca/Getty Images for the USC Shoah Foundation Institute

Oh, George! George Clooney is infamous for being a prankster, and now the Gravity star is getting in on another favorite celeb pasttime — photobombing! The 52-year-old actor played a joke on fellow Hollywood A-listers Steven Spielberg, Jerry Seinfeld and the comedian's wife, Jessica, when he photobombed them in New York City on Friday, Oct. 4.

PHOTOS: Celebrities Photobombing!

The funny moment went down during the annual USC Shoah Foundation Gala, where Clooney was actually being honored. The Tomorrowland star popped up for the silly snapshot at the event where he received the Spielberg-founded foundation's Ambassador for Humanity Award for his global humanitarian efforts in Haiti and throughout Africa. He snuck up on his pals looking bright-eyed, while waving his hand in the background.

Clooney has been busy the past few weeks, promoting Gravity — the Alfonso Cuardon-directed film is getting astounding Oscar buzz — alongside costar Sandra Bullock. Clearly always ready for a good time, Bullock, 49, revealed on LIVE with Kelly and Michael earlier this week that the two pals rapped competitively during their downtime on set to Sugarhill Gang classic "Rapper's Delight."

"I've got to give it to him," she joked. "There's a couple words — the bridges — that I chose not to learn. I'll give it to George. George has about 98 percent of that song down, in the eight minute version." 

When Clooney isn't goofing off with his famous friends, he can also be spotted spending time with his new flame — Monika Jakisic. Us Weekly exclusively revealed that the grey fox and the London-based model (and past ex!) had a sleepover at his L.A. mansion on Sept. 25. They "have an incredible connection," an insider explained.

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