The kicky miniskirt suit—made famous by TV’s late-1990s lawyer Ally McBeal—is back this fall, from designers such as Michael Kors and Tory Burch.

Skirt suits are back – but this time, instead of prim they’re decidedly edgy. Just look at who’s wearing them, and how: ethereal actress Anya Taylor-Joy in sharp monochrome Celine with a ...