Credit: WHPhotography/Splash News

Cory Monteith celebrates the big 3-0 today — that’s right, TV-high school senior Finn Hudson is 30 years old in real life — and his Glee castmates have spent the day sending out their well-wishes on Twitter.

Not surprisingly, Cory’s rumored girlfriend Lea Michele (Rachel) was the first to wish him the best on this big day. Not long after midnight on May 11, she tweeted, “AND since is after 12pm.. I'd like to be the first to wish a very special bday to a very special person @CoryMonteith.. happy birthday:) <3

Moments later, she followed up with, “Haha 12am..” Hey, she’s been hard at work filming until the wee hours of the morning. A temporary lapse in time brain functioning is perfectly understandable!

Credit: Ahmad Elatab/Splash News

Later in the day, closer to 9am that morning, Dianna Agron (Quinntweeted her birthday wishes, too. “A very Happy Birthday to @CoryMonteith & Dante. Cory, I want to see you dance tonight,” she wrote. Sounds like somebody has a party planned!

Amber Riley (Mercedes) soon added in, “Happy birthday big bro! @CoryMonteith,” while Damian McGinty (Rory) wrote, “Happy birthday to the nicest guy I know @CoryMonteith ...roll on tonight!!!

Harry Shum Jr. (Mike) , who himself turned the big 3-0 just last month, tweeted, “Happy BornDay @CoryMonteith!! You're now the flipped version of 03.

Grant Gustin (Sebastian) wrote, “Hey yo, @CoryMonteith!!! Happy birthday!” while Chord Overstreet (Samtweeted, “Happy birthday!!! to @CoryMonteith It's a big year!

Mark Salling (Puck) tweeted, "Big birthday holler to my good buddy @corymonteith. Hopefully we can have some gtwtS over the summer" Anybody else willing to bet that gtwtS stands for good times with the Saw? [Haha. We see what you did there, Saw.]

Naya Rivera (Santanawrote, “HAPPY HAPPY BIRTHDAY @CoryMonteith!!!!!! I heard 30 is the new 20 ;-)” 

Considering his Glee character is still only 18, she just might be onto something!

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