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Actress/MMA fighter Ronda Rousey attends the premiere of Warner Bros. Pictures' "Entourage" at Regency Village Theatre on June 1, 2015 in Westwood, California. (Photo by Jason Merritt/Getty Images)

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UFC Strawweight Champion Ronda Rousey of the United States poses for photographers during the UFC 190 Rousey vs Correia weigh-in at HSBC Arena on July 31, 2015 in Rio de Janeiro, Brazil. (Photo by Matthew Stockman/Getty Images)

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Actress Ronda Rousey arrives at Universal Pictures' premiere of "Furious 7'' at the TLC Chinese Theatre, Hollywood, on April 1, 2015 in Los Angeles.CA (Photo by Frazer Harrison/Getty Images)

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UFC women's bantamweight champion Ronda Rousey poses for a portrait during a UFC photo session at the Sheraton Rio Hotel on July 28, 2015 in Rio de Janeiro, Brazil. (Photo by Jeff Bottari/Zuffa LLC/Zuffa LLC via Getty Images)

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Ronda Rousey fights Liz Carmouche during their UFC Bantamweight Title bout at Honda Center on February 23, 2013 in Anaheim, California. (Photo by Jeff Gross/Getty Images)

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Cat Zingano takes down Ronda Rousey in their UFC women's bantamweight championship bout during the UFC 184 event at Staples Center on February 28, 2015 in Los Angeles, California. (Photo by Harry How/Getty Images)

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Ronda Rousey of the United States (red) defeats Bethe Correia of Brazi (blue) in their bantamweight title fight during the UFC 190 Rousey v Correia at HSBC Arena on August 1, 2015 in Rio de Janeiro, Brazil. (Photo by Matthew Stockman/Getty Images)

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Ronda Rousey enters the arena for her UFC women's bantamweight championship bout against Cat Zingano during the UFC 184 event at Staples Center on February 28, 2015 in Los Angeles, California. (Photo by Harry How/Getty Images)

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UFC fighter Ronda Rousey wears a Kangaroos AFL guernsey given to her by the Kangaroos players on September 16 at Etihad Stadium, 2015 in Melbourne, Australia. (Photo by Michael Dodge/Getty Images)

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Women's bantamweight champion Ronda Rousey of the United States holds an open training session at Pepe Beach on July 29, 2015 in Rio de Janeiro, Brazil. (Photo by Buda Mendes/Zuffa LLC/Zuffa LLC via Getty Images)

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UFC fighter Ronda Rousey (R) accepts the Best Female Athlete award from recording artist Britney Spears (L) and NFL player J. J. Watt (C) onstage during The 2015 ESPYS at Microsoft Theater on July 15, 2015 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

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Ronda Rousey attends the launch of the Reebok UFC Fight Kit at Skylight Modern on June 30, 2015 in New York City. (Photo by Brad Barket/Getty Images for Reebok)

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Ronda Rousey poses with her bronze medal on the podium for the women's -70kg judo competition at the 2008 Beijing Olympic Games on August 13, 2008 in Beijing. (Photo OLIVIER MORIN/AFP/Getty Images)