Music mogul and X Factor boss Simon sent his well wishes to Cheryl via Twitter last night (17 July).
Simon, who is back on the X Factor judging panel alongside Cheryl this year, also praised Jean-Bernard as a "great guy".
"I still can't believe my lil buddy Cheryl got married," said Simon. "Had no idea. He is a great guy. Am very happy for them."
Former Girls Aloud star Cheryl shocked fans at the beginning of this week by announcing she married her French beau JB on Monday 7 July, after just three months of dating.
The pair wed on the Caribbean island of Mustique, saying their vows in front of just four or five witnesses. The only identified guests so far have been Cheryl's mum Joan, her PA Lily England and JB's best man.
Showing off her diamond ring in a photo posted to Instagram, Cheryl explained this week (13 July): "I usually do not discuss my personal life but to stop the speculation I want to share my happy news... Jean-Bernard and I married on 7/7/14. We are very happy and excited to move forward with our lives together."
Meanwhile, Bishop Devon R Ollivierre, who wed the couple, has today revealed details about their nuptials, explaining that it was a "simple, short ceremony".
I still can't believe my lil buddy Cheryl got married. Had no idea. He is a great guy. Am very happy for them.— Simon Cowell (@SimonCowell) July 17, 2014
Cheryl is believed to have met JB at the Cannes Film Festival earlier this year, where he was running a pop-up bar.
The 'Fight For This Love' singer has received tons of congratulatory messages from fans since announcing her wedding news, and two of her former Girls Aloud bandmates have publicly congratulated her.
Close friend Nicola Roberts defended Cheryl and JB's whirlwind romance, while new mum Nadine Coyle sent her well wishes and urged Cheryl to "join the baby club".
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More stars who have tied the knot this year:
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