ANSA - Rome, May 10 - Beppe Grillo, the leader of the anti-establishment 5-Star Movement (M5S), said Friday he was against Integration Minister Cecile Kyenge's proposal for Italian citizenship to be automatically granted to all children born in Italy to migrant parents. Comedian-turned-political Grillo, whose movement won around a quarter of the vote in February's general elections, said there were no other laws of this kind in Europe, "aside from some extremely tightly regulated exceptions''. ''A decision that can change the geography of the country can't be left to a little group of parliamentarians,'' Grillo added on his blog, calling for reform of this kind to be put to a referendum. Italy and AC Milan striker Mario Balotelli has said he is willing to be an advocate of Kyenge's campaign for citizenship reform. The 22-year-old was born in Sicily to parents from Ghana and only obtained his Italian citizenship when he turned 18, although he grew up with Italian parents from the north of the country who adopted him.