The 24-year-old actress stars as Amanda on the 1960s-era ABC series.

In this episode, “Kiss Kiss Bang Bang,” Once in London, Ted (Michael Mosley) enlists Laura’s (Margot Robbie) help to try to make an old flame jealous, but things don’t go the way he expects.

“I’m enjoying that new experience,” Ashley told THR. “And I’ve never played a character from the 60s before. It’s a fascinating role to step into, experiencing everything from the wardrobe to the political and social issues of that era. So far, I’ve only shot a couple scenes with Michael, but he’s fantastic to play opposite of, and was very welcoming to the new girl!”

“Kiss Kiss Bang Bang” premieres THIS Sunday, December 4th @ 10PM ET/PT on ABC.