If it's a normal interview in a normal industry (ie not something über creative) I'd use it as a launch pad to talk about my relevant experience, referring back to my CV (which I'd expect them to have in front of them).
I don't ever share personal stuff, including party tricks, because it's none of their business. also because watching telly and drinking wine never got anyone a job
Something bland that ends with "and that's why I've always wanted to be a knife-juggler and have applied for this job".
So "born in Eastern Samoa, studied Hieroglyphics at X place, married with 17 children and 3 pet gerbils, started working as X with X company" and then rough outline of career progression/circumstances which led you to apply for this job. That sort of thing. All with bouncy enthusiasm that tells them you would fit right in as a knife-juggler.
They will be mindful of any gaps in your CV and/or where you contradict your CV, especially if it's the sort of job that might require an enhanced CRB.
You went to an interview and were asked that dreaded question
'Please tell us about yourself?'
*Do they mean professionally - surely that would be on your CV?
*Do they mean personally - and how much do you reveal? Do you tell them you like doing handstands in the bath, or that you know a song in the German/French/Latin language? Or would it be more of a standard 'I have 3 children, do the zumba on Monday nights, and my favourite food is spaghetti!'
Or is there another hidden aspect of the interviewee they are looking for?