Beyoncé has shared the first photo of Kelly Rowland's newborn son Titan
"There's no better feeling than holding my beautiful nephew," the 33-year-old – herself a mum to two-year-old Blue Ivy - wrote, "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."
Beyoncé also shared a glamorous pregnancy shot of Kelly
In addition to the touching message, Beyoncé shared a black and white photo of Titan's tiny hands. She also shared a striking pregnancy shot of Kelly, 33, showing the singer dressed in a glamorous gown and holding her baby bump.
Kelly and her husband Tim Witherspoon welcomed Titan, their first child, on Tuesday 4 November. The little boy was born at 1.30pm and weighed 7.5 lbs.
'Sisters' Beyoncé and Kelly Rowland
The following day, Beyoncé and Kelly's Destiny's Child bandmate Michelle Williams said the new mummy was "doing very well".
"Kelly's going to be an amazing mum," she told E! News. "She's always been great with children. She loves babysitting, she loved buying stuff for kids. She has such a big heart. She's a giver and a nurturing person and, really, that's what motherhood is all about."