This was no walk up the aisle for a Manhattan pedestrian who claims she was attacked by a wedding-dress designer’s dog.

Gina Giacomantonio, 42, was walking down West 20th Street when a black German Shepherd named Romulus lunged at her, latching onto her arm, she claims in court papers.

The beast was on a leash but the tether had slipped out of the hands of its owners, Thomas Allen and popular bridal-gown maker Elizabeth Fillmore, Giacomantonio claims in a $1 million legal filing.

The canine had no bite history, the city Health Department said, and no summons was issued.

But Allen and Fillmore allegedly told the city they knew their rescue pooch was an anxious animal, a lawyer for Giacomantonio said.

It was the second time in two years publicist Giacomantonio was been bitten by a dog, her attorney Daniel Hallak said.

“Every time she walks by a dog now she’s just frightened to death,” he noted.

Fillmore did not respond to messages.