Alesha announced she was expecting with dancer boyfriend Azuka Ononye on Thursday, and her 'Britain's Got Talent' co-judge was one of the first to send her well wishes on Twitter.
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Mother-of-two Amanda wrote: "Phew! and so happy for my girl @AleshaOfficial and Torso ! Can you imagine how beautiful that little one will be?!!"
Sounds like Amanda has been sitting on that secret for a while.
A statement released by Alesha's reps revealed her happy news.
It read: "Alesha Dixon and her partner Azuka Ononye are delighted to announce that they are expecting their first child later this year.
"Alesha and Azuka are looking forward to this happy chapter in their lives and would request privacy to enjoy this happy and most important event."
Alesha has been notoriously private about her love life, never publicly commenting on rumours about their relationship.
The couple first met in 2006, but friendship reportedly turned into romance in 2010, following the promotion of her album 'The Entertainer'.
Alesha - who has just been announced as a host on new ITV celebrity singing show, 'Your Face Sounds Familiar' - was previously married to rapper MC Harvey, but the couple divorced after he cheated on her with former 'Popstars: The Rivals' contestant Javine Hylton.
Who's the mumma? Kim KardashianWho's the daddy? Kanye WestBaby ETA: Next yearInteresting fact: Kim's difficulty conceiving the couple's second child was chronicled in 'Keeping Up With The Kardashians', before confirming she was pregnant with a son. (credit:Jason Merritt via Getty Images)
Pregnant Celebs(02 of08)
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Who's the mumma? Coleen RooneyWho's the daddy? Wayne Rooney. Maybe you've heard of him.Baby ETA: JanuaryInteresting fact: This will be the third child for the happy couple. (credit:Shirlaine Forrest via Getty Images)
Pregnant Celebs(03 of08)
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Who's the mumma? Sam FaiersWho's the daddy?Baby ETA: Early 2016Interesting fact: Sam confirmed her baby news on Instagram. (credit:Tim P. Whitby via Getty Images)
Pregnant Celebs(04 of08)
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Who's the mumma? Keira KnightleyWho's the daddy? James RightonBaby ETA: Spring 2015Interesting fact: Keira and James tied the knot in May 2013. This will be their first baby. (credit:Steve Granitz via Getty Images)
Pregnant Celebs(05 of08)
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Who's the mumma? Katherine JenkinsWho's the daddy? Andrew LevitasBaby ETA: Late 2015Interesting fact: The couple shared their baby joy with an adorable snap on Instagram of a pair of pink shoes. (credit:Steve Thorne via Getty Images)
Pregnant Celebs(06 of08)
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Who's the mumma? Olivia ColmanWho's the daddy? Ed SinclairBaby ETA: Summer 2015Interesting fact: The 'Broadchurch' actress has two children already with her writer husband, Ed. (credit:David M. Benett via Getty Images)
Pregnant Celebs(07 of08)
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Who's the mumma? Katie HalilWho's the daddy? Howard DonaldBaby ETA: Early 2016Interesting fact: This will be the first couple for the couple, who married secretly earlier this year. (credit:Bauer-Griffin via Getty Images)
Pregnant Celebs(08 of08)
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Who's the mumma? Kelly ClarksonWho's the daddy? Brendan BlackstockBaby ETA: Early 2016Interesting fact: Kelly confirmed her baby news in a typically Kelly Clarkson-esque fashion, by claiming she was "totally pregnant" during a live show. (credit:Bruce Glikas via Getty Images)