Pecorino Cheese

I'm trying out a recipe which asks for Pecorino Cheese?  I'm a cheese-a-holic but have never seen this in the supermarket before, I am completely wrong to think that I could use Parmesan instead?

Pecorino might be sold as 'Romano' cheese also.  And yes, just use Parm if you can't find Pecorino or Romano. 

Parmesan has a slightly stronger flavour but a very similar texture to pecorino, so I would say it should work.

I've never seen it in supermarkets, just in cheese shops and at Borough Market.

Vicky

Most supermarkets actually do have it and, as MrsR said, it'll usually be labelled Pecorino Romano:

One thing to note is that Parmigiano is cow's milk cheese, while Pecorino is sheep's milk.   

/now I have a desperate craving for Pecorino Toscano, the soft, mild cousin to Pecorino Romano.  So good with wild boar salami.

Thanks all! 

I am completely wrong to think that I could use Parmesan instead?

I'm sure it would still make a nice dish, but it won't be anything like the recipe's author intended. Decent Pecorino has a subtle but distinct sheepy flavour.