Then, suddenly, with 2:18 left in the blowout ... the Lakers sent in the youngest Antetokounmpo, Kostas -- and the party was ON!!
For close to a minute ... the three bros hooped, with Kostas at one point even guarding Giannis!
Eventually, Giannis was subbed out, but Kostas and Thanasis still went at it ... and Thanasis even splashed a 3-pointer in Kostas' face!
After the Bucks sealed the victory ... the three bros hugged it out on the court -- and Giannis later called it all "my favorite moment I've had so far in the NBA.