'Glee' Cast Celebrates Dianna Agron's Birthday!

Happy birthday, Dianna Agron! The "I Am Number Four" actress turned 26 today and tweeted that her "heart" is "swelling" from all the birthday love. "Thank you all for contributing so much love & joy," she wrote. "This is all too much. Truly. Feel so lucky & that this is gonna be a great year."

Dianna's fans weren't the only ones sharing their fondness for the actress. Her "Glee" co-stars took to Twitter to wish her the very best. Ashley Fink, who plays Lauren Zizes, said, "Awwwwwh!!! Happiest of birfdays to the cutest little lamb I know! The one and only @DiannaAgron!!! Xoxoxo." While the insanely cute Chord Overstreet tweet-screamed, "Happy birthday!!! @DiannaAgron have the best day ever!!!"

Naya Rivera, who plays the fiery Santana, also reached out to the star and posted, "It's officially the birthday of my Favorite lady! @DiannaAgron happy birthday! meeeooww! Love." No wonder why Dianna feels overwhelmed by all the affection. With co-stars like these, the star isn't short on friendly reminders of how much she's adored.

We're wishing Dianna lots of sweet cupcakes, warm hugs and the happiest of birthdays in today's Tweet Dreams!

Have you wished Dianna a happy birthday? What's your favorite Quinn scene so far this season? Let us know in the comments and on Twitter!