Hi Guys, this plant appeared in my garden this year on some bare soil. Anyone know what it is? There are lots of them btw, and they are about a foot tall.

Many thanks for all and any help!

Feverfew?

Maybe Feverfew (Tanacetum parthenium 'Flore Pleno') as it's a popular double bloom variety.

Thanks Stone and Calif_Sue, looks like it is feverfew

Now I just need to decide if I should keep it ... I think it is pretty, but I've read that it can take over.

I love mine, it's this golden one, self seeds nicely and I move the ones that pop up in wrong places.