25 biggest celebrity MMA fans: The Rock, Snoop Dogg, Madonna and more

LAS VEGAS, NV - MAY 23: (L-R) Daniel Cormier, Arnold Schwarzenegger and Chris Weidman pose for a portrait during the UFC 187 event at the MGM Grand Garden Arena on May 23, 2015 in Las Vegas, Nevada. (Photo by Mike Roach/Zuffa LLC/Zuffa LLC via Getty Images)
LAS VEGAS, NV - MAY 23: (L-R) Daniel Cormier, Arnold Schwarzenegger and Chris Weidman pose for a portrait during the UFC 187 event at the MGM Grand Garden Arena on May 23, 2015 in Las Vegas, Nevada. (Photo by Mike Roach/Zuffa LLC/Zuffa LLC via Getty Images) /
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NEWARK, NJ – FEBRUARY 01: Television personality Rosie O’Donnell attends the UFC 169 event inside the Prudential Center on February 1, 2014 in Newark, New Jersey. (Photo by Josh Hedges/Zuffa LLC/Zuffa LLC via Getty Images)
NEWARK, NJ – FEBRUARY 01: Television personality Rosie O’Donnell attends the UFC 169 event inside the Prudential Center on February 1, 2014 in Newark, New Jersey. (Photo by Josh Hedges/Zuffa LLC/Zuffa LLC via Getty Images) /

19. Rosie O’Donnell

Who would have thought that Rosie O’Donnell was a fan of MMA? If you watch her Twitter timeline during a big UFC event you’ll clearly see that not only is she devoted to the sport — but she understands it. O’Donnell is no casual fan.

O’Donnell hasn’t attended live shows lately, or at least she wasn’t photographed there, but there are images of her cheering on her favorite fighters at both UFC 128: Jon Jones vs. Shogun Rua and UFC 169: Renan Barao vs. Urijah Faber.

She’s been an outspoken super fan of Faber’s all the way back to his WEC days but now that Faber is retired she’s on the hunt for a new fighter to follow.

She even had Mike Tyson on her talk show and they talked their shared passion for MMA — adorable.