A-Rod, Julia Fox, Robin Roberts celebrate former WME agent Jon Rosen’s firm, Envisionary in NYC

Robin Roberts was among guests congratulating Jon Rosen.

Former WME agent Jon Rosen celebrated the first anniversary of his management company, Envisionary, in NYC this week.

Guests included former Yankees slugger Alex Rodriguez, “Uncut Gems” star Julia Fox and news anchors Robin Roberts, Willie Geist and Lara Spencer.

We hear that former CNN boss turned media VC pro Jeff Zucker was spotted hobnobbing with A-Rod, Geist and Stephanie Ruhle, while Fox showed off a new hair color for her latest role, spies said.

Rosen celebrated his company, Envisionary, with Willie Geist and other star clients. Alex Rodriguez was also at the party fresh off broadcasting the World Series.

Former ABC chairman Lloyd Braun was seen hanging out with Rosen and WME co-head Richard Weitz while guests enjoyed Envisionary’s signature cocktail collaboration with LALO Spirits.

(A-Rod headed off to see his Timberwolves play the Trail Blazers.)

Rosen exited WME to launch his own firm, and is known for repping top TV clients and celebrity chefs.

His new firm’s clients include Roberts, Ruhle, Geist, Al Roker, Hallie Jackson, Bobby Flay, Stephen A. Smith, “Cake Boss” Buddy Valastro, Rachael Ray, Giada De Laurentiis, rocker Steven Van Zandt, and Kaitlan Collins, among many others.

Former CNN boss Jeff Zucker was working the room. Getty Images

Brooke Johnson — former president at the Food Network — told The New York Times in 2009 that Rosen was, “instrumental in turning these chefs into A-list celebrities through choosing appropriate endorsements, merchandising deals, venues… to build their brands. It was trailblazing.”

He was WME’s head of East Coast TV in 2006 and also headed a branded lifestyle group at the storied agency.

Alex Rodriguez gives a wave to the cameras while arriving at JFK in New York City. GC Images

Rosen was also board member and partner at the agency.

Zucker, the former CNN boss, recently acquired Bright North Studios for RedBird IMI, and has also snapped up Media Res, EverWonder Studios, Hidden Pigeon Co., Front Office Sports and  All3Media Group.