Originally published on ProWrestlingSheet.

Much like the "All In" show taking place that same weekend, CM Punk's scheduled meet and greet sold out in record time.

Pro Wrestling Tees claims the initial 200 tickets for the August 31 appearance were gone in 50 seconds, so they added 100 more ... and those quickly sold out as well.

The wrestling shirt store says they'll now have a walk-up option for fans beginning at 4:00 p.m and Punk tweeted saying he'll try accommodate everyone who makes it out.

As we previously reported, Punk was spotted backstage at the All In news conference -- further fueling speculation of an appearance at the sold-out independent wrestling event.

Before all that though, the MMA fighter still has a showdown with Mike Johnson at UFC 225.