Dianna Agron & Lea Michele: 'Glee' Goes 'Grease'!

Dianna Agron wears a bright yellow coat on the set of Glee on Tuesday (December 6) in Ventura, Calif.

The 25-year-old actress’s co-stars – Lea Michele, Heather Morris, Naya Rivera, and Chris Colfer – also got to work on the Grease-inspired episode, which they taped at a local high school.

“I don’t know if you’ve ever lost someone to Alzheimer’s, but I have. Both of my grandmothers. If you feel compelled, and have the money to share…,” Dianna recently wrote on her Facebook page, with a link to an eBay auction for The Elephant Project that features a beanie baby and signed card.

“As my Nana used to say, ‘The sun WILL come out tomorrow.’ And then she’d sing the song to me. She couldn’t carry a tune, but it made me smile every time and I love that we will always have our song,” Dianna added.

10+ pictures inside of Dianna Agron, Lea Michele, and more filming Glee…