
Amy Louise Acker (born December 5, 1976) is an American actress, best known for her roles as Root on the scifi drama series Person of Interest (2012–2016), Caitlin Strucker on the superhero drama series The Gifted (2017-2019, based on Marvel Comics' X-Men), Winifred Burkle / Illyria on the supernatural drama series Angel (2001–2004), and Kelly Peyton on the action drama series Alias (2005–2006).
She has been married to actor James Carpinello since 2003 and they have 2 children.

Catch Me If You Can
2002 · as Miggy

The Cabin in the Woods
2012 · as Wendy Lin

Ordinary Angels
2024 · as Theresa Schmitt

The Unbreakable Boy
2025 · as Lori

Celebrity Mix
2005 · as Self (archive footage)

Superman: Red Son
2020 · as Lois Lane (voice)

United We Fan
2018 · as Self

Much Ado About Nothing
2013 · as Beatrice

Fire and Ice: The Dragon Chronicles
2008 · as Luisa

Average Joe
2024 · as Denise Kennedy

Outside
2020 · as Woman

Dear Santa
2011 · as Crystal Carruthers

The Lord of Catan
2014 · as Sugar Monkey

Groom Lake
2002 · as Kate

A Novel Romance
2015 · as Sophie Atkinson

Invader
as Diane

21 and a Wake-Up
2009 · as Caitlin Murphy

Sironia
2011 · as Molly