'Forever and ever': Kelly Rowland and Michelle Williams celebrate Beyoncé's 39th birthday

Destiny truly is forever.

Destiny's Child alums Kelly Rowland and Michelle Williams celebrated Beyoncé's 39th birthday Friday by sharing sweet tributes on social media.

Rowland, 39, posted a photo to Instagram of her standing by Queen Bey, both of them sporting a smile and wrote a heartfelt message.

"To my one who knows me, sometimes better than I know myself!," Rowland captioned the photo. "YOU already know... Forever and ever babe! Happy Birthday Love!"

Williams, 41, shared an adorable black and white throwback photo of a young Beyoncé and spoke on the "Black is King" visionary's work ethic.

"The awesome thing about this picture is that it causes me to reflect on how you KNEW who you wanted to be! You worked super hard and you are truly who you’ve always wanted to be!! ," Williams wrote. "I’m so honored to not only know who you’ve wanted to be as an artist and to experience that with you but an even greater joy to see the woman, sister and friend you continue to be!"

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Williams continued noting that Bey's childhood photo is a reminder that "everyone pretty much starts out the same way" and serves as encouragement.

The Destiny's Child trio has continued to maintain a close friendship, at times reuniting for performances.

In 2018, Beyoncé ma '90s kid happy during her Coachella headlining performance by reuniting with Rowland and Williams onstage to sing classics such as "Lose My Breath," "Say My Name" and "Soldier."

Rowland also made a cameo in Bey's "Black is King" visual project, making an appearance during "Brown Skin Girl," a single where part of the lyrics are dedicated to her.

"My BB, to say that I am proud of this masterpiece you’ve created, would be an understatement!....and to be apart of it...Whew...I am inspired, deeply moved, and love you," Rowland wrote to Instagram at the time, sharing a photo of a scene from the single.

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This article originally appeared on USA TODAY: Beyonce's 39th birthday: Kelly Rowland, Michelle Williams celebrate