Cynthia Watros is an American television actress, who also starred in films and on stage. She is best known for her roles as Libby on the AbcTV series Lost, Kellie in The Drew Carey Show, Erin in Titus, and Annie Dutton in Guiding Light. She was born in Lake Orion, Michigan.

Graduating from Lake Orion High School, Watros attended Macomb Community College. She transferred to Boston University and graduated with a BFA, and like many, headed to New York City to seek fame. She was cast as Agnes Gooch in a Broadway musical theatre production of Auntie Mame. She also appeared as one of the Pigeon Sisters in The Odd Couple with Llama Productions.

Watros initially became known for her role as Annie Dutton on the CBS soap opera Guiding Light from 1994 to 1998. Her character, a nurse, began as a heroine, but she gained notice and critical acclaim when her character's rivalry with Reva Shayne (played by Kim Zimmer) led her to become a scheming villainess. In 1998, Watros won a Daytime Emmy Award as "Outstanding Lead Actress" for her role on Guiding Light.

In 1998, Watros briefly filled in for Jensen Buchanan as Victoria Hudson McKinnon on Another World while Buchanan was on maternity leave.

Watros is also known for several primetime television roles. She appeared as Erin Fitzpatrick from Santa Maria California on Titus from 2000 to 2002 and gained recognition as a comedic actress, playing the real-life fiancée of the title character. After Titus was canceled, she took on the role of Kellie Newmark on The Drew Carey Show, as a replacement for the departure of Christa Miller Watros played the role from 2002 to 2004. As a welcoming gesture, Drew Carey sent flowers to her on a weekly basis.

From 2005 to 2006, she was a cast member on the hit Abcseries Lost. She played psychologist Libby, a member of the "Tailies", a group of survivors of the plane crash who were in the tail section of the plane (and not seen during Season One). Towards the end of the season (in the episode Two for the Road), Libby was shot and killed by Michael Dawson (played by Harold Perrineau along with Ana Lucia Cortez (played by Michelle Rodriguez. She has returned to the show as a guest star occasionally since her departure, in flashbacks and as a vision/hallucination of other characters, mainly by the character Michael (Perrineau).

After her departure from Lost, Watros filmed a pilot for a show titled My Ex-Life for CBS. She was slated to play the ex-wife of a character played by Tom Cavanagh. However, the pilot was not chosen by CBS. Watros was also the lead in The Rich Inner Life of Penelope Cloud, a 2007 CBS television pilot. "Penelope" was a comedy about a former literary genius who has an awakening and decides to pursue optimism instead of cynicism. The pilot was created by Jeff Greenstein and also featured Marisa Tomei

She also filmed a pilot for Valley Girls, a spin-off of the CW series Gossip Girl set in the 1980s. Watros plays CeCe Rhodes, the socialite ex-wife of Rick Rhodes, played by Andrew McCarthy, and mother of the series' protagonists. Valley Girls has not been picked up for CW's fall schedule but remains in contention for midseason.