She was born in Santa Monica, California.
Her middle name, Amada, is the name of a character Mendes played in the 2007 drama We Own the Night.
Her parents began dating in 2011 while working together on the film "The Place Beyond the Pines." In April of 2016, she welcomed a little sister named Amada Lee.
Her dad, Ryan Gosling, was nominated for an Academy Award for his performance as a teacher in 2006's Half Nelson.