Mike Tysonhas delivered the first hit.

During the ceremonial weigh-ins on Thursday night,Jake Paulloped toward his rival on the floor.

When Paul stood up, Iron Mike swiftly slapped the younger boxer with his right hand.

Mike Tyson Slaps Jake Paul in Face in Final Staredown

Mike Tyson, left, and Jake Paul face off during weigh-ins on Nov. 15 in Arlington, TX.Stephen McCarthy/Sportsfile via Getty Images

Security quickly separated the two as Paul mocked Tyson and played to the crowd.

When speaking to reporters, Paul brushed off the smack, saying, I didnt even feel it.

He continued to taunt Tyson: Hes angry.

Hes an angry little elf.

Mike Tyson, I thought that was the cutest slap, buddy.

But tomorrow youre getting knocked the fuck out.

Paul then grabbed the mic and yelled, Its personal now!

Tyson, 58, weighed in at 228.4 pounds.

When discussing his legacy, Tyson offered a sobering message.

I just think thats another word for ego.

Legacy doesnt mean nothing, thats just some word everybody grabbed on to, Tyson said.

Im just passing through and then Ima die and its gonna be over.

Who cares about legacy after that?

He continued, Who the fuck cares about me when Im gone?

Maybe your grandkids, but who the fuck cares.

@Mike Tyson aint worried about legacy.

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