The “Aquaman” star chatted up the fishmonger while picking out salmon, a spy tells us, but otherwise, “wasn’t talking with anyone.”

“She was very unassuming,” says the fellow shopper. “She was very Hamptons casual. No makeup. Everyone left her alone.”

Heard isn’t burying her head in Häagen-Dazs after the brutal case. We’re told they spied her picking up “Cheerios, Diet Coke and cauliflower.”  Also spotted in her cart were Tate’s cookies, a red pepper and lettuce.

Amber Heard admits to still LOVING Johnny Depp0 seconds of 59 secondsVolume 90% 3Heard was seen picking up items like Diet Coke, Cheerios and cauliflower.

Along with her outing to TJ Maxx, Page Six had previously spotted her dining at Greek restaurant Calissa in Water Mill, N.Y., with her sister, Whitney Heard, and Whitney’s two children.

Whitney has been by Amber’s side, testifying at the trial and posting on Instagram after the verdict, “I still stand with you, sissy.”

3The actress has been trying to stay low-key after losing her court battle with ex Johnny Depp.Getty Images

Heard, who was mercilessly vilified on social media, owes Depp $8.4 million in damages. Sources previously told the NYPost that she is “broke” due to hefty legal fees.

Heard has called the outcome a “setback” for women.

3Heard was spotted last week shopping at TJ Maxx in Bridgehampton, N.Y.Getty Images

“To my dying day, I’ll stand by every word of my testimony,” she recently told NBC’s “Today” host Savannah Guthrie. And stated that Depp’s “lawyer did a better job at distracting the jury from the real issues.”

Depp, meanwhile, just announced a tour with his band with Alice Cooper and Joe Perry, the Hollywood Vampires.