'90s pop band Hanson stun fans looking "unrecognisable" during latest television appearance

British fans are complaining they feel "old" after '90s teen pop group Hanson made a recent television appearance 25 years after the release of their worldwide smash hit MMMbop.

The American boy band joined hosts Holly Willoughby and Phillip Schofield yesterday on the set of This Morning, all looked noticeably more grown-up than fans remember.

The brothers have released six albums since their 1997 debut and now have 15 children among the three of them.

The oldest member and guitarist Isaac, 41, has three, the youngest member and drummer, Zac, 36, has five, and lead singer Taylor, 39, has seven.

The group took part in the interview to promote their new track 'Child At Heart,' but some fans are struggling to come to terms with the brothers' new look.

The group finished the interview with a modern rendition of their classic hit 'MMMBop.'