When Zach was just a struggling actor, he made friends with a lady named Mimi. After his flick, The Hangover became a super-hit, his visits with his old mates lessened. However, when he learned that his old friend Mimi, who used to work at Fox Laundry, was homeless and suffering from a financial crisis, he immediately came to her rescue. He bought her an apartment to live in and took care of her rent and utilities.

He also used to take her to premiers of his movies and people often mistook her for his girlfriend.