JLS big mouth Ortise Williams has accidentally revealed the sex of bandmate Marvin Humes' baby.
Marvin's wife, The Saturdays' Rochelle, is currently pregnant with the couple's first child, and they had managed to keep their secret from the media.
However, Ortise let it slip that they are set to welcome a baby boy during an interview at the 'Iron Man 3' premiere in London on Thursday night.
He told reporters on the red carpet: "I'm going to get him an Iron Man doll. Every little boy has got to have a super hero."
Whoops!
He soon realised his tongue had run away with his and tried to cover up his comments.
"I mean I don't know what they are going to have," he said. "I'm just the guy that becomes an uncle when it happens."
Concluding it was too late to cover his tracks, he added: "I'm in trouble, I'm always in trouble that's how it goes I guess."
Marvin told The Mirror earlier this year that they were going to find out the sex.
"I think we are going to find out if we are having a boy or girl because we are so excited and too impatient," he said.
Rochelle and Marvin announced they were expecting their first child together back in November, after getting married last July.
Iron Man 3 Premiere
Iron Man 3 Premiere - London(01 of34)
Drew Pearce arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(02 of34)
Lizzie Cundy arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(03 of34)
Sir Ben Kingsley arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(04 of34)
Blake Harrison arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(05 of34)
Stanley Tucci arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(06 of34)
Magician Dynamo arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(07 of34)
(Left to right) Drew Pearce, Robert Downey Jr, Don Cheadle, Rebecca Hall, Shane Black and Sir Ben Kingsley arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(08 of34)
Sarah Jane Crawford for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(09 of34)
Robert Downey Jr and Rebecca Hall arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(10 of34)
Don Cheadle arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(11 of34)
(left to right) Don Cheadle, Rebecca Hall, Sir Ben Kingsley and Robert Downey Jr arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(12 of34)
Robert Downey Jr and his wife Susan Downey arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. PRESS ASSOCIATION Photo. Picture date: Thursday April 18, 2013. See PA story SHOWBIZ IronMan. Photo credit should read: Yui Mok/PA Wire (credit:PA)
Iron Man 3 Premiere - London(13 of34)
Don Cheadle, Rebecca Hall, Sir Ben Kingsley and Robert Downey Jr arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
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Robert Downey Jr and Rebecca Hall arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
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Rebecca Hall arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
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Robert Downey Jr and wife Susan Downey arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(17 of34)
Robert Downey Jr and Rebecca Hall arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
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Robert Downey Jr poses with fans at the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
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Rebecca Hall arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(20 of34)
EDITORS NOTE CONTENT. Rebecca Hall arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(21 of34)
(Left - right) Sir Ben Kingsley, Robert Downey Jr and Rebecca Hall arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. PRESS ASSOCIATION Photo. Picture date: Thursday April 18, 2013. See PA story SHOWBIZ IronMan. Photo credit should read: Yui Mok/PA Wire (credit:PA)
Iron Man 3 Premiere - London(22 of34)
Carmit Bachar arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
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Robert Downey Jr and Rebecca Hall arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(24 of34)
Robert Downey Jr and his wife Susan Downey arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. PRESS ASSOCIATION Photo. Picture date: Thursday April 18, 2013. See PA story SHOWBIZ IronMan. Photo credit should read: Yui Mok/PA Wire (credit:PA)
Iron Man 3 Premiere - London(25 of34)
Don Cheadle arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. PRESS ASSOCIATION Photo. Picture date: Thursday April 18, 2013. See PA story SHOWBIZ IronMan. Photo credit should read: Yui Mok/PA Wire (credit:PA)
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Rebecca Hall arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
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Kimberly Wyatt posing with a man in an Iron Man suit at the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
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A fan in the crowd wearing an Iron Man mask at the premiere of Iron Man 3 at the Odeon Leicester Square, London. PRESS ASSOCIATION Photo. Picture date: Thursday April 18, 2013. See PA story SHOWBIZ IronMan. Photo credit should read: Yui Mok/PA Wire (credit:PA)
Iron Man 3 Premiere - London(29 of34)
A fan in the crowd at the premiere of Iron Man 3 at the Odeon Leicester Square, London. PRESS ASSOCIATION Photo. Picture date: Thursday April 18, 2013. See PA story SHOWBIZ IronMan. Photo credit should read: Yui Mok/PA Wire (credit:PA)
Iron Man 3 Premiere - London(30 of34)
Robert Downey Jr and his wife Susan Downey arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. PRESS ASSOCIATION Photo. Picture date: Thursday April 18, 2013. See PA story SHOWBIZ IronMan. Photo credit should read: Yui Mok/PA Wire (credit:PA)
Iron Man 3 Premiere - London(31 of34)
A fan in the crowd wearing an Iron Man mask at the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(32 of34)
Robert Downey Jr with a young boy at the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(33 of34)
Kimberly Wyatt (right) and Carmit Bachar arriving for the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
Iron Man 3 Premiere - London(34 of34)
Magician Dynamo posing with a man in an Iron Man suit at the premiere of Iron Man 3 at the Odeon Leicester Square, London. (credit:PA)
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