Robert Redford’s former pied-a-terre apartment on the Upper East Side is now on the market for $1.35 million.

Redford owned unit #6 at 47 E. 67th St., a limestone mansion between Madison and Park avenues, in the 1980s.

The apartment is a one-bedroom duplex co-op with one full bathroom and a powder room, a double-height ceiling and a woodburning fireplace.

Other features include a chef’s kitchen with a wine fridge, a dining area and a loft bedroom with lots of closet space.

The unit overlooks townhouse gardens and is “pet and pied-a-terre friendly,” according to the listing.

The listing brokers are Cathy Taub and Alexis Van Der Mije McAndrew, of Sotheby’s International Realty.