Jennie Garth celebrates School Years Eve at Disneyland!

Jennie Garth and her family celebrated School Year's Eve at Disneyland on Sunday, and ET was with the "90210" star!

"It's really the most important time of the year for these kids," says Jennie. "[My husband] Peter [Facinnelli] and I are very involved with our daughters' education and I think it's vital that parents really do commit to getting involved."

Developed by Cookie magazine and the National PTA, School Year's Eve is a new national holiday to mark the new school year.