Would you expect a musician who's recorded a couple of moderately successful albums, or someone who's, idk, a qualified pilot outside of work, just to not mention that at all?
I would be surprised if they didn't mention it casually once they have started work, but wouldn't expect them to have put it on their CV necessarily, or perhaps only briefly touched on it as an 'interest', if it wasn't relevant to the job they were applying for. I totally get that these things are really important to you and I don't want to come across as not caring about my employees' lives and hobbies at all, I absolutely do, we talk a lot and I always make a point to ask how their Tae Kwan Do tournament or gig with their band or whatever went at the weekend, but in the recruitment process I make a big effort to be as objective as possible to purely select on who will do the job best, regardless of things like background, race, personality type etc etc, and that's really why I don't particularly want to hear about hobbies etc on a CV, I think it just gives you a (sometimes false) idea about a person which doesn't really affect anything in terms of their skills, qualifications etc. Also, I wouldn't think this way, but I am sure there are employers out there who would actively avoid employing someone who has achieved amazing things outside work, like being a professional level sportsperson, or a successful artist or whatever, because they would think that would mean they won't be as committed to the job as someone who pretends that work is their be all and end all!
Obviously all this is different if you are applying for work actually in the performing arts sector, in which case you should probably ask for advice from someone who knows the norms of the industry better and how CVs are usually laid out. The advice PymChurch and I and others are giving is based on generic corporate/public sector/third sector type roles. It may be really different in other industries. For instance generally I say CVs should be about 2 sides of A4 in a normal type font, maybe 2.5-3 if really necessary, no longer. But it's totally normal for doctors' CVs to be much much longer, more like a novella length once they are senior consultants, because its normal to list every research paper you've contributed to, every clinical audit or improvement project you've been involved in, every conference you've attended in the last 10 years and so on, which can run to many many pages! So any doctors reading this can ignore pretty much everything that's been said (except for the things about spell checking and glittery gifs etc which still apply!). And as others have said, it is different again in the USA or in Europe etc.