Die-hard fans lined up to get their hands on Hello Kitty-themed food, including Hello Kitty donuts and colorful Hello Kitty macarons.
The truck was scheduled to stay at the location until 10 p.m., according to Irvine Spectrum's Twitter account.
There are rumors that a Hello Kitty Cafe may set up shop in Orange County in 2015.
City News Service contributed to this report.