Kathryn Gallagher

Kathryn Gallagher

Kathryn Gallagher is an American singer and actress best known for her portrayal of Bella Fox in the Broadway musical Jagged Little Pill, for which she received a Grammy Award for Best Musical Theater Album and a nomination for the Tony Award for Best Featured Actress in a Musical.

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Known For

The Kelly Clarkson Show

The Kelly Clarkson Show

2019

Blue Bloods

Blue Bloods

2010 • as Diane Butler

The Flash

The Flash

2014 • as Lia Nelson

You

You

2018 • as Annika

You

You

2018 • as Annika Atwater

Stars in the House

Stars in the House

2020 • as Self

Filmography

2025

Pavements
Pavements
as Loretta
Movie - Released: 5/2/2025

2024

Parachute
Parachute
as Gwen
Movie - Released: 4/5/2024
Woman of the Hour
Woman of the Hour
as Charlie
Movie - Released: 10/3/2024

2021

Gossip Girl
Gossip Girl
as Heidi Bergmann
TV - Released: 7/8/2021

2020

Ben Platt: Live from Radio City Music Hall
Ben Platt: Live from Radio City Music Hall
as Self
Movie - Released: 5/20/2020
One Night Only: The Best of Broadway
One Night Only: The Best of Broadway
as Performer
Movie - Released: 12/11/2020
Jagged Live In NYC: A Broadway Reunion Concert
Jagged Live In NYC: A Broadway Reunion Concert
as Bella
Movie - Released: 12/13/2020
Stars in the House
Stars in the House
as Self
TV - Released: 3/16/2020
Acting for a Cause
Acting for a Cause
as Friar Lawerence
TV - Released: 3/27/2020

2019

Jagged Little Pill: The Musical.
Jagged Little Pill: The Musical.
as Bella Fox
Movie - Released: 12/5/2019
Modern Love
Modern Love
as Whitney
TV - Released: 10/18/2019
The Kelly Clarkson Show
The Kelly Clarkson Show
TV - Released: 9/9/2019

2018

You
You
as Annika
TV - Released: 9/9/2018
You
You
as Annika Atwater
TV - Released: 9/9/2018

2014

The Flash
The Flash
as Lia Nelson
TV - Released: 10/7/2014

2010

Blue Bloods
Blue Bloods
as Diane Butler
TV - Released: 9/24/2010

Unknown

Movie
Ordinary Girl in a Tiara
as Philippa Levreaux
Movie