The Glee cast met last week for a private ceremony  commemorating the life of late castmember Cory Monteith , but they've also been expressing their feelings publicly. Recently, Cory's longtime girlfriend and costar Lea Michele  finally broke her silence on Twitter  and Darren Criss spoke outduring and appearance on Conan. While his death has inspired an outpouring of emotional reactions from celebrities who knew and loved him, the news has undoubtedly hit his costars the hardest. Mike O'Malley (aka Burt Hummel) also recently spoke at the Summer TCA about working with Monteith on the Glee set. Click through to see the heartfelt messages from Monteith's fellow Glee stars and famous friends.
Lea Michele  finally broke her silence on Twitter , posting a beautiful photo of herself with Cory, and the following caption:
"Thank you all for helping me through this time with your enormous love & support. Cory will forever be in my heart."
Darren Criss spoke out during his guest spot on Conan:
"Obviously it’s been a very rough time, but when you start picking up the pieces after something as tragic as this, we’re picking up the pieces now, and there’s two things you gotta remember about Cory . . . He was a really funny guy, had a great sense of humor, he loved life, and he always took care of his friends and wanted his friends to be happy. So it’s only right that we start to try to smile again, try to laugh again, that's something he would've wanted."
Kevin McHale  shared a photo of himself with Cory on the set of Glee, along with this statement:
"So thankful that I and so many of you got to experience Cory's overwhelming kindness, humor and talent. There will not be a day that goes by that I won't miss him. Thank you all for your incredible support and patience."
Glee's Chris Colfer opened up by posting a screenshot of himself and Cory  on his Instagram account. The image was accompanied by the caption:
"I'll never forget all the laughs we shared or the faces we made after awkward interview questions. Love and miss you, buddy."
Amber Riley, one of the original Glee stars, tweeted: "Yesterday I got to sit with my Glee family and remember a man I considered a brother and friend. With a very heavy heart, RIP Cory Monteith . Continued prayer for his family and Lea. Sending hugs to all you gleeks."
Mike O'Malley, who plays Kurt's father and Finn 's stepfather on the show, commented on the actor's passing during the Summer TCA panel for his new show, Welcome to the Family:
"Many of my scenes on Glee were with either Chris Colfer or Cory Monteith . I think that I had probably the toughest scene I've ever acted in my career as an actor opposite him when I had to throw his character Finn out of the house because of a slur that he had used. It was remarkable to me, when we were shooting that scene, over and over again, the emotion he was able to portray: the sorrow, the shame. Ever since I met him, he was the fictional quarterback on that show and he was the very real quarterback on that set. He was an incredibly warm guy, a guy who was welcoming to everyone on that show, from the beginning to the new folks who came on to the show this past year. He was a very, very hardworking actor. I just loved working with him. He was a great guy. I miss him very much."
Monteith's close friend and costar Chord Overstreet dedicated an original song to him at a show on July 20. The chorus goes:
"There's a war going on,
Hits me deep in my bones,
I can't self destruct now,
From just being alone.
Well, it's another heartache,
If you've been through it breaking,
There's never a love like before,
And you can cry if you want,
But it's not gonna stop this war."
Fellow Glee star Jenna Ushkowitz posted a vintage picture of the original cast on Instagram, with the following statement:
"I am so grateful that Glee brought this group of extraordinary individuals together to form a family. I was lucky enough to closely experience the love and light that Cory shared with the world, as well as having the privilege of traveling down the road together on a once in a lifetime journey. Cory always reminded me to be gracious, kind and open, and he will leave a mark in my heart forever. Thank you everyone for your constant support and love while we mourn the loss of our dear friend, and continued support to Cory's family, and to Lea."
Jane Lynch , who plays Sue Sylvester on Glee, stopped by the Tonight Show With Jay Leno and got emotional during the interview when talking about Cory's death. She told the host that Cory "had one of the biggest hearts," and "was a real bright light," adding, "I don't think he left one day unlived."
When asked how she thinks that Cory should be remembered, Jane recalled a time when the actor flew cross-country to be with a terminally-ill fan whose last wish it was to meet him, saying, "That's the kind of guy he was — a real giver."
As one of the original Glee cast members, Dianna Agron  played Quinn Fabray, a mean-girl cheerleader and Finn  Hudson's first love interest on the show. The actress released a heartfelt statement about Cory Monteith 's death:
"I have never lost a friend. In this difficult time, I am leaning on all of the wonderful memories we shared with Cory, how many ways he was able to make us smile. Glee was a gift to all of us. It gave us a family in this industry. We really cut our teeth and grew up on this show. In playing underdogs, we learned that we had dug into the hearts of our viewers and that we could stay there. Cory is so deserving of that place in everyone's hearts. He was one of the most generous and kind people that I have ever met. He had a smart, curious mind, he was an enormous talent. He was loving to not only me but my family. My heart goes out to his family, to Lea, to everyone that is struggling with the loss of our friend. We will miss you Cory. We will always carry a piece of you with us."
Naya Rivera, along with Cory Monteith , was an original Glee cast member — she portrays Santana Lopez, who often clashed with Cory's character, Finn  Hudson. Naya released the following statement about her friend's passing to The Hollywood Reporter :
"The entire Glee family and I are deeply saddened by this tragedy. Cory was and always will be a part of my own family and a good friend. He was a special part of this world and will forever be missed. My heart goes out to Cory’s family and Lea and while we are grateful for everyone's well wishes, privacy during this time of grief is greatly appreciated."
Cory Monteith  starred with Selena Gomez  in the 2011 romantic comedy Monte Carlo. Selena took to Twitter upon hearing the news of his death:
"This hurts. I love you Cory. Rest in peace. My thoughts and prayers are with you and your family."
Gwyneth Paltrow , who guest-starred on Glee as substitute teacher Holly Holliday, released a statement expressing her grief:
"Cory was a sweet and talented man. My heart breaks for Lea and the entire Glee family."
Glee actor Matthew Morrison , who starred alongside Monteith as teacher and glee club leader Will Schuester, was scheduled to perform his cabaret act at NYC's 54 Below nightclub after hearing the news of Monteith's death. He went on with the show and dedicated the song "What I Did For Love" to his late friend, reportedly telling the crowd:
"We have to acknowledge the elephant in the room and Cory's passing. We lost a great young man too soon. You came here to see a show, and I came here to do a show. This show is in Cory's honor.”
Harry Shum Jr.
Harry Shum Jr. plays fellow New Directioner Mike Chang on Glee. He tweeted:
"At this time, please send nothing but love and light. This tragic news still doesn't seem real to me. I love you Cory."
Ricky Martin had a guest-starring role on Glee as a McKinley High Spanish teacher in 2012. He tweeted:
"I just heard the news. This is so sad. My heart goes out to his family & friends, specially Lea Michelle. Rest in peace Cory #RipCoryMonteith."
John Stamos appeared as dentist Carl Howell in Glee's second season. He took to Twitter to share memories of Monteith:
"First day on Glee he said to me, I can't believe I'm working w/Uncle Jesse- I can't believe i'm writing this tweet. Heartbreaking. RIP Cory. We talked about how lucky he felt to be alive-and sober. We talked about playing drums. Glad I knew you Cory."
Damian McGinty, who played exchange student Rory Flanagan, expressed his sadness on Twitter:
"The guy I shot my first acting scene with. The nicest guy I've met. Can't believe it."
Adam Shankman directed and choreographed multiple episodes of Glee, and he was deeply saddened by Monteith's passing. He tweeted this photo, saying:
"Goodbye my amazing and beautiful friend. The lights in my world just grew dimmer. The world just lost one of our best. I love u so much... I will always cherish you in my heart. Thank you for so many wonderful days. I love you CM."
Mark Salling  portrays bad boy Noah "Puck" Puckerman on Glee. Of his friend's passing, he first tweeted the word "no," which he later deleted and replaced with this message:
"Going through a million memories and emotions today. I'll love you always Brother Cory."
Actress Katie Cassidy played Monteith's onscreen girlfriend in 2011's Monte Carlo. After his sudden passing, she took to Twitter, writing:
"So sad to lose a dear friend & talented man... @CoryMonteith you'll always be remembered."
Broadway star Idina Menzel, who played the role of Rachel Berry's estranged mother, tweeted:
"I hate twitter at a time like this. Nothing i write will convey my sadness for corey & all who loved him."
Romy Rosemont plays Finn  Hudson's mom, Carole, on Glee. The actress posted the following message to Twitter while mourning her onscreen son:
"Cory was a gentle, sweet soul & I am grateful to have had the chance to play his Mom. My heart is w/ his family, his Glee family & sweet Lea."
Lauren Potter, who plays cheerleader Becky Jackson on Glee, took to Twitter to share her sadness over Monteith's passing:
"I am totally heartbroken right now. I love Cory so much this hurts my heart. I hope my #glee family is ok right now. I love them all. Cory was always so nice to me. I have so many good memories."
Dot-Marie Jones plays McKinley High gym teacher and football coach Shannon Beiste on Glee, and she has shared many heartfelt scenes with Monteith's character on the show. She tweeted:
"I have no words! My heart is broken. Cory was not only a hell of a friend he was one of the most amazing men that I will hold close to my heart forever . . . I am blessed to have worked with him and love him so much! My heart is with his family and our whole Glee family! I love you all!"
Canadian actor Kevin Zegers starred alongside Monteith in All the Wrong Reasons, which is currently in postproduction. About his friend and costar, Zegers tweeted:
"My heart is broken. I've never lost a friend this close. This feels like a mistake."
Nolan Gerard Funk
Nolan Funk plays the aggressive and steroid-abusing lead of the Warblers, Hunter Clarington, on Glee. He took to Twitter to express sadness for Cory Monteith 's death:
"Oh my God. Cory. Man. I can't. Praying for you man. You were a good soul. Thanks for always being kind Cory. You came a long way from hanging on the beaches in Vancouver with the gang pre Glee. Sending you love bud."
Mike O'Malley played Burt Hummell, Cory Monteith 's onscreen stepfather. The actor released a statement to People , saying:
"Cory Monteith was a great guy; Funny, deep, thoughtful, and hardworking. In real life, he was the coolest dude, generous, and a great friend to his pals. As Finn  Hudson, he did what so many actors strive to do: authentically portray human behavior in a specific, understated manner, thereby eliciting laughter and creating camaraderie with his audience. If an ability to show others kindness and fostering fellowship are two qualities that all humans should strive for, Cory mastered them long before he died. He deserved a long life. His death has rocked all of us at Glee."
Josh Groban appeared as himself in two episodes of Glee. He took to Twitter to share his grief:
"While I only met him briefly on set, I remember him to be an extremely sweet guy. Tragic. RIP Cory."
Katie Couric played herself in an episode during Glee's second season. She tweeted:
"My heart goes out to Cory Monteith 's family... I met him on the Glee set years ago & he was so lovely and charming."
Olivia Newton-John played herself on an episode of Glee, performing her hit "Physical" with Sue Sylvester. She expressed her sadness over Cory Monteith 's passing on Twitter:
"Cory Monteith. So sad. So young. So sweet. So talented.
My condolences and prayers go to his family and loved ones xo."
Kristin Chenoweth  guest-starred as McKinley High alum April Rhodes, and posted the following to her Twitter account:
"RIP Cory Montieth. You will be loved. Always."