N ew England roots run deep for Jenny Slate, so much so that she sometimes has to consciously try to shut off her Massachusetts side. “I’m from the South Shore,” Slate told the Globe in a recent phone interview. “I’m from Milton, and my dad is from Quincy, my mom is from Brockton, and my family also lives in Massachusetts, and I live there most of the year, too.

It’s nonstop for me.” The actress, comedian, and writer didn’t have to hide her Bay State background — or the occasional slip of the South Shore accent — while filming the Boston-set romantic drama “It Ends with Us.” An adaptation of Colleen Hoover’s hit 2016 novel, Slate plays Allysa, the stylish best pal of Blake Lively’s Lily Bloom, who work together in a picturesque, Back Bay flower shop.

Slate describes her character as “unstoppably vivacious” and “excited about her newfound wealth,” living her best life with husband Marshall (Hasan Minhaj). Allysa is “never casual” with her fashion either, sporting a number of eye-catching outfits throughout the film. “It’s extremely fun to dress as someone who really has no apology about having an intensity and a performative style, almost,” Slate said.

“I tend to dress differently than that, so just for me, it’s incredibly fun playing around.” Advertisement Directed by “Jane the Virgin” star Justin Baldoni, who also plays Lively’s love interest, Ryle, the film features scenes set in Boston and Maine. However, the majori.