
Elizabeth Anne Caplan (born June 30, 1982) is an American actress. Her performances as Virginia E. Johnson in the Showtime series Masters of Sex (2013–2016) and as Libby Epstein in FX on Hulu's Fleishman Is in Trouble (2022) have earned her nominations at the Primetime Emmy Awards.
Her first acting role was on the television series Freaks and Geeks (1999–2000). Since then, she had series-regular roles in several television series including Related (2005–2006), Party Down (2009–2010; 2023), Das Boot (2018), Castle Rock (2019), Truth Be Told (2019), Fatal Attraction (2023), and Zero Day (2025).
Caplan's film breakthrough came with her role as Janis Ian in Mean Girls (2004). Her other film appearances include My Best Friend's Girl (2008) Cloverfield (2008), Hot Tub Time Machine, 127 Hours (both 2010), Save the Date, Bachelorette (both 2012), The Interview (2014), Now You See Me 2, Allied (both 2016), and Cobweb (2023).
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Now You See Me: Now You Don't
2025 · as Lula

Mean Girls
2004 · as Janis Ian

Cloverfield
2008 · as Marlena

Now You See Me 2
2016 · as Lula

Hot Tub Time Machine
2010 · as April

The Interview
2014 · as Agent Lacey

127 Hours
2010 · as Sonja Ralston

Cobweb
2023 · as Carol

Allied
2016 · as Bridget Vatan

Orange County
2002 · as Party Girl

Extinction
2018 · as Alice

The Night Before
2015 · as Diana

The Disaster Artist
2017 · as Lizzy Caplan

Crossing Over
2009 · as Marla

My Best Friend's Girl
2008 · as Ami

Bachelorette
2012 · as Gena Myers

The Sidekick
2013 · as Bailey

Marvel One-Shot: Item 47
2012 · as Claire Wise