Are there actors who became idols?

Hey y'all! So I've been in this rabbit whole about the old Hollywood star system and Motown and how they have influenced kpop in it's core industry tenets.

Right now I encountered the "idols becoming actors/models" niche and I wanted to ask if there are any instances of adult/teen actors becoming idols? It seems that most of it are idols becoming actors but there aren't that much or even there arent any readily available information at all about actors becoming idols themselves.

Most of the idol backgrounds I came across were former child actors turned idols and while that could answer some few things it's not really relevant considering these child actors probably stopped acting for a time and started training to be an idol.

But what I mean are actors who are not child actors who became idols and why they aren't so common.

Are actors just not trained to sing and dance which is why none of them opt to being an idol? And are idols trained to act as well when they were trainees?

Sorry if all this doesn't make sense please tell me to elaborate more! Although I appreciate your answers! Thanks so much! ❤️