Kevin Holland On 'Wonderboy' Thompson Fight, I'm Gonna KO The Nicest Guy Ever!

If you've heard Stephen Thomspon speak, you know he's just about the sweetest person ever ... so, will UFC star (and fellow nice guy) Kevin Holland hesitate when it comes time to punch Wonderboy in the face?? Not at all, according to Big Mouth.

"It's simple as hell. I'm gonna go out there and I'm gonna knock out the nicest man in the universe. S**t happens."

But, will you feel bad, Kevin?

"Not one bit."

30-year-old Holland and 39-year-old Thompson are fighting in the main event at UFC Fight Night Saturday night.

In fact, the men ran into each other in the hallway at the UFC hotel ... and had a funny interaction.

Wonderboy is ranked 6th in the welterweight division. Holland isn't ranked ... as he bounces back and forth between the welterweight and middleweight divisions.

We also talked to Kevin about his last fight ... where he bravely stepped up on no notice to fight Khamzat Chimaev. Holland, who had trained to fight striker Daniel Rodriguez, was submitted in the first round.

Holland addresses whether he wants a rematch.

We also spoke to Wonderboy ... who says fans are in for a treat.

"My last two guys, and even Kevin, his last opponent [Khamzat] was a heavy grappler. I know going into this fight that he's not the type of guy to try and take you down and hold you down," Wonderboy says.