Standing outside the Leeds Corn Exchange, the actress showed off the unusual dress as she posed for cameras in an attempt to encourage more people to go vegan.
Rokhsaneh - who plays Leyla Harding in the Yorkshire soap - was representing People for the Ethical Treatment of Animals (PETA) on the eve of World Vegetarian Day, which takes place today.
PETA members were also in attendance to raise awareness of the cause, handing out vegan sausages to passers-by.
In a statement, Rokhsaneh said: "I went vegan six years ago - out of concern for my health and also a hatred of animal cruelty - and I haven't looked back!
"I saw an immediate improvement in my skin, my waistline is trimmer, and I can enjoy delicious vegan food knowing that I'm in no way contributing to the suffering and death of animals."
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