Louis Tomlinson, Zayn Malik, Niall Horan, and Harry Styles shared a joint statement on the official One Direction Instagram account on Thursday.
"We're completely devastated by the news of Liam's passing," they said. "In time, and when everyone is able to, there will be more to say. But for now, we will take some time to grieve and process the loss of our brother, who we loved dearly."
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"The memories we shared with him will be treasured forever," they continued. "For now, our thoughts are with his family, his friends, and the fans who loved him alongside us. We will miss him terribly."
"We love you Liam," they said at the end of their statement before co-signing it from all four of them.
In addition to the joint statement, a few members also made individual posts.
On Instagram, Tomlinson wrote, in part, "I want you to know that if Bear ever needs me I will be the Uncle he needs in his life and tell him stories of how amazing his dad was. I wish I got chance to say goodbye and tell you one more time how much I loved you."
Malik also took to Instagram and said, in part, "I will cherish all the memories I have with you in my heart forever, there is [sic] no words that justify or explain how I feel right now other than beyond devastated."
Payne was a member of One Direction alongside Horan, Styles, Tomlinson and Malik. The group was formed on "The X Factor" in 2010 and went on to release five albums, including "Up All Night" in 2011 and "Made in the A.M." in 2015.
In 2015, Payne embarked on a solo career and released a number of singles, including "Strip that Down" in 2017. He also released the album "LP1" in 2019.
Payne's collaborators and friends mourned him in moving social media posts following his death.
Simon Cowell, a judge on "X-Factor" where One Direction was first discovered, said he was "heartbroken" in a post on social media Friday.
"Liam, I am truly devastated. Heartbroken. And I feel empty," Cowell said. "And I wanted you to know how much love and respect I have for you. Every tear I have shed is a memory of you."
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Payne's family also issued a statement in the wake of his death, writing, "We are heartbroken. Liam will forever live in our hearts and we'll remember him for his kind, funny and brave soul. We are supporting each other the best we can as a family and ask for privacy and space at this awful time."
Styles' mother, Anne Twist, shared a heartbroken emoji to Instagram and wrote in the caption, "Just a boy ... ."
Read more tributes to Payne here.