Merritt Carmen Wever (born August 11, 1980) is an American actress. She is known for starring as a perennially upbeat young nurse in Nurse Jackie (2009–2015), an intrepid widow in the Netflix period miniseries Godless (2017), and a detective investigating a serial rapist in the Netflix crime mini-series Unbelievable (2019). For Nurse Jackie, she won the Primetime Emmy Award for Outstanding Supporting Actress in a Comedy Series in 2013, for Godless, she won the Primetime Emmy Award for Outstanding Supporting Actress in a Limited Series or Movie in 2018 and for the mini-series Unbelievable, she was nominated the Golden Globe Award for Best Actress – Miniseries or Television Film in 2020.

Wever has also had supporting roles in other television series, including Studio 60 on the Sunset Strip (2006–2007), New Girl (2013), and The Walking Dead (2015–2016). She has also played supporting roles in such films as Michael Clayton (2007), Birdman (2014), and Marriage Story (2019), all of which were nominated for the Academy Award for Best Picture, with Birdman winning.