John Cleese disses Taylor Swift's cat

(AP)

Taylor Swift changed into a glittery-pink number to perform at the iHeartRadio Music Festival at the MGM Grand Garden Arena on Sept. 19, 2014 in Las Vegas, Nevada. (AP)

Singer Taylor Swift poses on arrival at the 2013 MTV Video Music Awards in New York August 25, 2013. REUTERS/Andrew Kelly (UNITED STATES Tags: ENTERTAINMENT)(MTV-ARRIVALS) - RTX12WM3

Don't mess with Taylor Swift's cat!

When British actor John Cleese took a swipe at the "Shake It Off" singer's cat on the Graham Norton Show, Swift went silent at the actor's rudeness.

"How did it have the accident?" Cleese asked Swift after being shown a picture of Olivia Benson, the singer's cat named after Mariska Hargitay's "Law and Order: SVU" character.

"What accident," an annoyed Swift replied.

"Is that a proper cat? That's the weirdest cat I've ever seen in my life."

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    Watch what happened when the 24-year-old defended her cat in the video below.

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