Big day for UFC champ Jan Blachowicz ... who was invited to sit down with the Prime Minister of Poland after winning the light heavyweight title!!!
Check out the pics of Jan with Mateusz Morawiecki choppin' it up in Warsaw on Wednesday ... to celebrate Jan's big victory over Dominick Reyes at UFC 253.
37-year-old Jan flew back to Poland right after the insane 2nd round knockout and he's been treated like a ROCKSTAR ever since ... with a hero's welcome at the airport and now an invite to hang with the PM.