https://en.m.wikipedia.org/wiki/Robert_Reiner_(businessman)
More a local celebrity in his birth place than like real a class celeb. Howevery, he's the reason why I got to sign the golden book of my home town when I was 10something. I still wish I had a good Signature back then and not just plain (and ugly) cursive.
It's only 3 plants in Germany, but you are not allowed to have more than 50g in your home. Which is a bit difficult to control and achieve, but we take what we get.