Rebecca Sara Newton (born July 4, 1978, New Haven, Connecticut, The United States) is an American actress.
She is perhaps best known for her roles as Quinn Garvey on Sitcom How I Met Your Mother and as Amanda Tanen on the ABC Dramedy Ugly Betty for which she received a Screen Actors Guild Award nomination for Outstanding Performance by an Ensemble in a Comedy Series.
She's married to Chris Diamantopoulos and they have two children together.
- Burly TV (2001) as Herself / Host
- Cold Case (2003) as Melanie Whitley (1976)
- Guiding Light (2003 — 2004) as Fantasy Daughter
- American Dreams (2004) as Mindy
- Law & Order: Special Victims Unit (2004) as Colleen Heaton
- The Mens Room (2004) as Lily
- Charmed (2005) as "Glamoured" Piper Halliwell
- Ugly Betty (2006 — 2010) as Amanda Tanen
- Love Bites (2011) as Annie Matopoulos
- How I Met Your Mother (2012 — 2013) as Quinn Garvey
- The Goodwin Games (2013) as Chloe Goodwin
- Weird Loners (2015) as Caryn Goldfarb
- Divorce (2018 — Present) as Jackie Giannopolis
- Tell Me a Story (2018 — 2019) as Katrina Thorn
- Ms. Fanservice: Known for playing sexy characters, such as Sexy Secretary Amanda in Ugly Betty.
- Promoted Fanboy: She campaigned for her part in How I Met Your Mother.
- Omniglot: Speaks Spanish, German, and Greek.