After years of alternating between long and short blonde hair – with a splash of copper thrown in just for fun – fans were thrilled to see Alex embrace a new, darker colour.
"Brunettes have more fun! You look fab!!" one commented, another adding: "Love it! You can pull off any colour."
The change means Alex's hair now matches her two sons, who both sport mops of dark hair as well as their mum's cheeky grin.
Her eldest, 10-year-old Elijah is from a previous relationship and also met Alex's former Bachelor flame Richie before the couple's eventual split in late 2017.
"Elijah's dad, step mum, Carson and I do everything we can to make things as easy as possible for all of us," Alex told Now To Love in 2021.
She revealed the key is "working together" and sometimes having to make compromises, which helps everything work smoothly.
Family photos show the foursome enjoying plenty of quality time together, with more recent snaps revealing how much Elijah and baby brother Maxwell have already bonded.
And with her new brunette 'do, the similarities between Alex and her two boys are more obvious than ever before.
The 30-year-old first found fame in 2016 when she appeared on Richie's season of The Bachelor, going on to win and start a serious relationship with him.
But the romance didn't last and less than a year later they announced they had split.
In 2019 the exes both appeared on Bachelor in Paradise, where they shared heated words about their split.
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This article first appeared on our sister site, Now to Love.