Is Jenna Ortega getting back into Wednesday mode? While promoting her new film, Death of a Unicorn, the California-born actor has been seen in everything from a plaid zoot suit to a frilly sage gown.

On the red carpet, Ortega seemed like a transport from the mid-20th century, in a tailored Oscar de la Renta fit that acted as a modern spin on the zoot suit. Ortega’s look consisted of a gray ...