He’s like a whole new man, er, Boy!

One of the Proud Boy goons busted last week over a brawl with Antifa protesters outside an Upper East Side Republican club underwent a total makeover for his court appearance Thursday.

John Kinsman, 39, shaved his long, scruffy beard, chopped off his scraggly hair and ditched his Carhartt overalls for a gray suit and tie.

The World Trade Center steel inspector was in Manhattan Criminal Court to find out whether he’d been indicted for the Oct. 12 melee outside the Metropolitan Republican Club — he hasn’t been yet.

He was nearly unrecognizable with his short-cropped hair gelled back and donning a pair of stylish black-rimmed glasses.

Members of the far-right Proud Boys — which has been designated a hate group by the Southern Poverty Law Center — got into a fracas with leftist protesters after the group’s founder, Gavin McInnes, delivered a speech at the usually staid club.

Kinsman, one of five Proud Boys arrested so far, was previously described by Assistant DA Joshua Steinglass as the “single most vicious of all the attackers” that night.

According to prosecutors, Kinsman body slammed, repeatedly punched and stomped on an Antifa member all while a cigarette dangled from his mouth.

The father of two faces assault, attempted gang assault and riot raps.

Attorney Ronald Hart said last week in court that “The Proud Boys did not instigate this fight” and that Kinsman had been overcharged because of the surrounding publicity.

In addition to Kinsman, Irvin Antillon, 41, Douglas Lennan, 40, Maxwell Hare, 26, and Geoffrey Young, 38, have been charged in connection to the beatdown.

Kinsman is due back in court Dec. 6.

Additional reporting by Alex Taylor