The middle brother from Hanson has certainly grown up, hasn't he? Taylor, 29, and his wife Natalie welcomed their fifth child on Tuesday, 2 October.
In a statement to US magazine People, the thrilled new parents said daughter Wilhelmina Jane Hanson was "welcomed by more love than could fit in the room".
Taylor achieved heartthrob status as the middle member of the formerly long-haired brother band Hanson, alongside brothers Isaac and Zac.
And since his 'MmmBop' days, the star has gone on to grow a rather large family. Taylor and wife Natalie, 28, are parents to children Ezra, 9, Penelope, 7, River, 6, and 3-year-old Viggo.
Brothers Isaac and Zac have also been settling down, with both being married and dads to two kids. Isaac, 31, and wife Nicole have sons Clarke, born 2007, and James, born 2008, while Zac, 26, and wife Kate are parents to daughter Junia, born 2010, and son Shepherd, born 2008.
Congratulations Taylor and Natalie!
What do you think about Taylor's choice of baby name? Let us know below!
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Watch Hanson's classic music video for 'MmmBop' below: