The big winners took the streets to celebrate another Lombardi trophy ... and some fans showed up as early as 6 AM to join in on the fun.

Mahomes was slugging beers throughout the parade route ... wiggling around to the music as he donned his customized WWE Championship belt and held a silver "MVP" ball.

Of course, his wife and biggest supporter, Brittany, was there to enjoy her second Super Bowl parade as well.

Travis Kelce had his mom, Donna, right by his side on top of his bus ... pumping up the crowd and having a blast.

Kelce also once again proved why he's got some of the best hands in NFL history ... snagging a Fireball shot from a fan and taking it to the head, much to the crowd's delight.

Frank Clark and Chiefs defensive coordinator Steve Spagnuolo joined in on the fun ... hopping off the team's buses to shake hands with fans along the parade route.

Fans didn't just pack the streets to show their support for the team -- they also climbed up trees to get a better view of their beloved champs.

Mahomes clearly enjoyed himself ... almost slipping on the team bus as he addressed the crowd. Thankfully, Chiefs QB coach Matt Nagy was there to help the 2x-MVP. 😅

Former Chiefs running back Jamaal Charles was in the celebration spirit early on ... buying Kansas City fans beer at a local tavern before the parade started.