On Tuesday (4 November), Kelly welcomed Titan, her first child with husband Tim Witherspoon, into the world.
In a heartfelt message, Beyoncé has now sent her well wishes to her pal and it seems she may have already met Kelly's new arrival.
Sharing a very cute photo of a pair of hands clutching onto those of a baby, Beyoncé told her fans there was "no better feeling than holding onto her nephew".
Alongside her photo, she wrote: "There's no better feeling than holding my beautiful nephew. I thank god for the honour of witnessing my sister's journey into motherhood.
"I've always dreamt of our little ones growing up together. I'm so thankful for our bond. Baby Ty, I love you so much. Congrats to my Spoons."
The Destiny Child's bandmates have been close friends since they were younger, so it's no surprise Bey was one of the first to meet little Titan.
Back in May, Beyoncé was even bridesmaid for Kelly when she married Tim in a secret Costa Rican wedding.
Although Kelly and Tim had kept their nuptials on the down low, the 'Drunk in Love' singer appeared to give the game away as she posted a photo of herself on their wedding day, in her bridesmaid dress.
But, clearly Kelly didn't seem to mind too much if Bey was first on her baby's meet and greet list!
Following giving birth to Titan, Kelly's rep confirmed to People magazine that both mother and baby are "happy and healthy".
Celebrities who have welcomed babies in 2014:
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