Blake Lively (The Town) The Town

Blake Lively plays Krista Coughlin, Jem's sister, Doug's ex-girlfriend, and the mother of a young daughter named Shyne. Krista is the film's most trapped character -- addicted, underemployed, and living in the shadow of men who treat her as either a liability or a convenience. Lively was twenty-two when she auditioned for a role written as a thirty-seven-year-old Boston mother, and she fought for the chance to prove she could disappear into it.

Lively fought for an audition Affleck did not want to give her

The character of Krista was written older, harder, and more weathered than anything in Lively's resume suggested she could play. Affleck, then casting from his Gossip Girl-era public image of Lively, was skeptical.

"She was written as a 37-year-old mother from Boston and so he didn't want to read me... But I fought for an audition." — Blake Lively, CinemaBlend (2020)

David Crockett, the casting director, described the audition as transformative:

"They read, and... she did the accent. She prepped for that for God knows how long." — David Crockett, The Ringer (2020)

Lively's Boston accent was convincing enough that, according to multiple reports, directors and crew members asked her what part of Boston she was from. The accent work required not just phonetic accuracy but class specificity -- Krista's voice carries the Charlestown projects, not the gentrified waterfront.

Affleck recognized that Lively would surprise audiences

"Blake came in and read the scene and was amazing... she's gonna be able to really surprise people." — Ben Affleck, The Ringer (2020)

The surprise was the point. Lively's physical beauty -- which had defined her career to that point -- becomes part of Krista's tragedy. She is a woman who should have had options and didn't, whose looks are a currency she can spend only in a neighborhood that doesn't value them. The performance strips glamour away and replaces it with desperation.

Variety called her "almost unrecognizable"

The critical response to Lively's performance was among the most positive of her career. Justin Chang's Variety review singled her out:

Lively was "almost unrecognizable [and] has fierce, pained moments as the moll and single mother... tossed aside." The transformation was both physical -- Lively wore minimal makeup and unglamorous costuming -- and behavioral. Krista's restless energy, her needling of Doug at the bar, her collapse under Frawley's pressure at the hospital -- these are played with a rawness that has no vanity in it. (variety)

The hospital scene is the performance's hinge

Frawley breaks Krista at the hospital (beat 37) by threatening custody of her daughter Shyne. The scene requires Lively to move from defiance to desperation to betrayal in a single conversation. Krista's decision to inform on the crew is played not as treachery but as survival -- the act of a mother who has nothing left to bargain with except information.

The line "Dougy's going away after" is delivered almost involuntarily, as though Krista's loyalty to the code evaporates the instant her child is threatened. It is the moment that gives Frawley Fenway, and Lively plays it as someone who has just traded everything she was raised to protect for the only thing she cannot lose.