Any fan of the WWE will know that CM Punk have never had a problem with speaking his mind and comes to a life with a microphone in his hand.
By contrast, Punk - real name Phil Brooks - is quite a reserved guy away from the glaring lights of his profession.
He takes on Micky Gall at UFC 203 this Saturday in Cleveland in what will be his first ever MMA fight at the age of 37.
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Debuting in the UFC is quite a feat, but Punks box office appeal with have no doubt persuaded president Dana White to give him a shot.
After remaining silent for the vast majority of the nearly two years he has been signed with the promotion, ahead of his debut in the octagon Punk has had plenty to say in the many interviews he has taken during fight week.
One topic Punk spoke about with Sports Illustrated was fellow WWE alumni Brock Lesnar USDA drug violations in the wake of his victory of Mark Hunt at UFC 200.
"I think it sucks. I get tested by USADA all the time, and I'm the drug-free kid. It's like when you're driving on the highway and the cop is behind you – 'Well, I wasn't speeding, and my taillight isn't out, but let me slow down.' The whole thing bums me out. Brock came back, he fought an impressive fight and won, and then he failed a test. It bums me out when anybody fails a test."
Punk and Lesnar faced off at SummerSlam in 2013 in the WWE and were both represented by Paul Heyman at various times throughout their careers.
Now, Punk will look to emulate Lesnar's success in the world of MMA with a victory in his first outing.