The late, great “Dallas” star Larry Hagman had one final role besides the iconic J.R. Ewing before his death last year.

He played a Costco sample salesman!

The beloved actor will be on CBS’s “I Get That a Lot,” a hidden-camera show featuring celebrities as everyday people and the double-take reactions they get from confused passersby.

The segment with Hagman is set to air tomorrow night at 8.

Hagman went over the top, swaping his cowboy hat for a hair net.

Hagman was dishing out samples of barbecue sauce, and some customers kept coming back for seconds, just to have a second look at the disguised actor.

“I wouldn’t be working here if I was J.R.,” the actor comically told one customer who remarked on the resemblance.

“That’s true,” the amused shopper replied.