James Mischka, Helen Mirren, and Mark Badgley.

BADGLEY MISCHKA’S HONOR ROLL: Mark Badgley and James Mischka will be the guests of honor Thursday at the National Arts Club, where they will take home the Medal of Honor for Achievement in Fashion. Hal Rubenstein and Alexandra Dillard will present the award to the designers, who have been in business for more than 28 years.

Rubenstein befriended Badgley and Mischka early in his career before he started at InStyle magazine or linked with HSN to launch a signature collection. Dillard, whose family owns 300-plus stores, got to know the honorees through the horse-show world, where Badgley has earned accolades for his equestrian skills.

Another one of the designer’s loyalists, “Eye in the Sky” actress Mirren, will be sending her well-wishes via video since she will no longer have a seat at their table as planned. Although the Oscar-winning actress is shooting “Collateral Beauty” in New York with Will Smith, her schedule Thursday now calls for an overnighter out of town.

The design duo were selected by the historic club’s 12-person-plus fashion committee. An installation of their evening gowns through the years will be displayed in the 118-year-old club overlooking Gramercy Park, so that the 125 guests at the black-tie dinner can get a closer look.

This is shaping up to be a momentous stretch for Badgley and Mischka, who recently bought back the rights to their name from the Iconix Brand Group for $16 million. There are rumblings that the founders plan to relaunch a fragrance — 10 years after they first launched one. And in lieu of a runway show for their fall collection, the designers are filming a 10- to 12-minute movie for the company’s social channels and Web site.