Melanie Jayne Lynskey (born 16 May 1977) is a New Zealand actress and voice actress. She is the recipient of several accolades, including a New Zealand Film Award, a Hollywood Film Award, and a Sundance Special Jury Award, as well as Critics' Choice Award, Gotham Award and Golden Nymph Award nominations.
Lynskey made her film debut at age 17, starring as a teenage murderess in Heavenly Creatures (1994). After moving to the United States, she built a career playing supporting parts in films such as Ever After (1998), Detroit Rock City, But I'm a Cheerleader (both 1999), Coyote Ugly (2000), Abandon, Sweet Home Alabama (both 2002), Shattered Glass (2003), Flags of Our Fathers (2006), Away We Go, Up in the Air, The Informant!, Leaves of Grass (all 2009), Win Win (2011), Seeking a Friend for the End of the World and The Perks of Being a Wallflower (both 2012).
Lynskey received critical praise for her performance in Hello I Must Be Going (2012), which proved to be a turning point in her career. Subsequent lead roles in Happy Christmas, We'll Never Have Paris (both 2014), The Intervention, Rainbow Time, Little Boxes (all 2016), I Don't Feel at Home in This World Anymore, And Then I Go (both 2017) and Sadie (2018) have established her as a prominent figure in the American independent film community.Outside of film, Lynskey achieved fame with her portrayal of Rose on the sitcom Two and a Half Men (2003–2015). From 2015 to 2016, she starred as Michelle Pierson on the HBO series Togetherness, for which she earned a nomination for the Critics' Choice Television Award for Best Supporting Actress in a Comedy Series. She provided the voices of Beatrice for Cartoon Network's Over the Garden Wall (2014) and Megan for Disney XD's Future-Worm! (2016–2018). In 2018, she starred as Molly Strand on the Hulu series Castle Rock. Lynskey is engaged to actor Jason Ritter; they have one child.
She is also known as Melanie Jayne Lynskey.