Meredith Kathleen Hagner is an American actress. She began her career portraying Liberty Ciccone on the CBS soap opera As the World Turns (2008-2010), which earned her a Daytime Emmy Award nomination for Outstanding Younger Actress in a Drama Series in 2009. Following her departure from As the World Turns, she appeared as a series regular on the FX drama Lights Out (2011) and the TBS sitcom Men at Work (2012-2014).

Hagner gained further prominence for her role as Portia Davenport in the TBS and HBO Max dark comedy series Search Party (2016-2022), receiving critical praise for her performance. She also appeared as a series regular on the Facebook Watch comedy-drama Strangers (2017-2018), the Quibi comedy Dummy (2020) and Apple TV's Bad Monkey (2024). Hagner's film roles include Hits (2014), Folk Hero & Funny Guy (2016), The Oath (2018), Brightburn (2019), and Palm Springs (2020).