Marinette's Birthday is on the 9th of July, and she was born in 2003.

How old is Marinette 2020?

In the main series. Marinette is the female protagonist of the Miraculous series. She is a 1.35m tall, 14 year-old girl portrayed as a French-Chinese teenage student from Paris, who wishes to become a fashion designer.

When was Adrien Agreste born?

Therefore I conclude that Adrien's Birthday is the 19th of October, and he was born in 2004.