The Princess Sent To The Future

A princess presses a button in her own castle and arrives in the present, which gives the wardrobe a reason to hold two eras at once.

The version of this that works is not simply modern clothes. It is a look that keeps one thing from where she came from, a fabric, a colour, the way something is fastened, and lets the rest be current. That is how period characters are actually costumed in film, and the rail here is deep enough to try it.