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20 May 2013, 15:54
The two bands have been posting online today to welcome baby Alaia-Mai to the world.
The Saturdays and JLS have all taken to Twitter this afternoon (20th May) to congratulate band members Marvin Humes and Rochelle Wiseman on the birth of their first child.
'Proud' singer Marvin revealed that the couple's daughter Alaia-Mai Humes was born this morning, and their bandmates soon began posting messages of well wishes online in the wake of the news.
"Incredible news @MarvinHumes and @RochelleTheSats!" The Saturdays star Mollie King tweeted. "Can't wait to meet the little beauty! Give mummy a hug from us please Marv ;-) xxx.
"Massive congratulations to @RochelleTheSats & @MarvinHumes on the birth of little Alaia-Mai! I can't wait to meet her!" Vanessa White also posted, while Una Healy posted: "Big love and congratulations to @RochelleTheSats and @MarvinHumes on the birth of their baby daughter Alaia-Mai so excited to meet her!!"
Check out a picture of Marvin and Rochelle together last month below (Credit: Getty):
Marvin's bandmates from JLS also got involved when they began posting to mark the first member of the band to become a parent.
"@MarvinHumes @RochelleTheSats congratulations! Can't wait [to meet] her!" JB Gill tweeted. "May God richly bless the 3 of you in every way! Sending all my love Jx.
"WOW the 1st baby of JLS! Congrats @MarvinHumes & @RochelleTheSats," Oritse Williams added. "Alaia-Mai Welcome to the big beautiful world! Love Uncle Reesh."
Capital FM presenter Marvin and '30 days' singer Rochelle were wed last summer and announced their were expecting their first child together back in late 2012.
The Saturdays released a teaser clip for their new 'Gentleman' music video last week, while they are set to perform live at the Capital FM Summertime Ball 2013 next month (9th June).