| Year | Title | Role | Notes |
| 1988 | Captive Rage | Lucy Delacorte | |
| 1990 | Monday Morning | Susan Pevensie | |
| The Hogan Family | Annie Derrick | 4 episodes |
| 1991 | Lies Before Kisses | Adrianne Arness | TV movie |
| Shades of L.A. | Holly | Episode: "Send Up the Clowns" |
| Baywatch | Kelly | Episode: "Thin or Die" |
| 1992 | Night Sins | Billie Reed | TV movie |
| 1992–1995, 2002–2003, 2012–2013, 2018 | Days of Our Lives | 679 episodes |
| 1993 | Robot Wars | Annie | |
| 1994 | Winter Heat | Billie Reed | TV movie |
| 1995 | Vanished | Marielle Delauney |
| 1996–1998 | Melrose Place | Taylor McBride | Main cast; 66 episodes |
| 1997 | Close to Danger | Jennifer Cole | TV movie |
| 1998 | House Rules | Cassiopa "Cassie" Devine | Episode: "Pilot" |
| Nick Fury: Agent of S.H.I.E.L.D. | Contessa Valentina "Val" Allegra de Fontaine | TV movie |
| 2000 | Another Woman's Husband | Laurel McArthur |
| Movie Stars | Amy Wells Hunter | Episode: "The Seduction of Reese Hardin" |
| 2001 | Oh, Baby | Michelle Grant | TV movie |
| Sex, Lies & Obsession | Joanna Thomas |
| Good Advice | Veronica Simpson | |
| 2002 | My Adventures in Television | Samantha | Episode: "The Chinese Baby" |
| 2002–2006 | Soap Talk | Herself / co-host | Main cast; 104 episodes |
| 2003-2005 | Merge | Main cast; 56 episodes |
| 2004 | 8 Simple Rules | Holly | Episode: "YMCA" |
| 2004–2005 | Veronica Mars | Lynn Echolls | 3 episodes |
| 2006 | Dancing with the Stars | Herself | Contestant |
| 2006 | Wheel of Fortune | Herself | Soap Stars Week Episode 2 |
| 2006–2023 | Live with Regis and Kelly | Herself / Guest / Guest Co-Host | 24 episodes |
| 2007 | Tease | Herself / Host | Herself; 6 episodes |
| Entourage | Donna Devaney | Episode: "Malibooty" |
| 2008 | Hannah Montana | Francesca | Episode: "Killing Me Softly with His Height" |
| 2010 | Community | Chantelle Cahill | Episode: "The Art of Discourse" |
| Harry Loves Lisa | Herself | Main role; 6 episodes |
| The Real Housewives of New York City | Episode: "Fashion and Fighting" |
| 2010, 2020 | RuPaul's Drag Race | Herself / Guest Judge | Season 2, Episode 4: "Snatch Game" (2010)Season 12, Episode 13: "Reunited: Alone Together" (2020) |
| 2011 | Big Time Rush | Brooke Diamond | Episode: "Big Time Moms" |
| The Celebrity Apprentice 4 | Herself | Season 11 |
| 2013 | All-Star Celebrity Apprentice | Season 13 |
| The Tonight Show with Jay Leno | Amanda's Mother | Episode: "Episode " |
| 2014 | Sing Your Face Off | Herself | Contestant; season 1 |
| Awkward | Eva Mansfield | Episode: "Snow Job: Part 1" |
| 2014–2022 | The Real Housewives of Beverly Hills | Herself | Main role; 180 episodes |
| 2015 | Bound & Babysitting | Jane | TV movie |
| The Real Housewives of Orange County | Herself | Episode: "Suspicious Minds" |
| Crime Scene Investigation | Tori Nolan | Episode: "Under My Skin" |
| The Hotwives of Las Vegas | Kendra | Episode: "What Happens in Vegas... Seriously, What Happens There?" |
| 2017 | The Middle | Tammy Brooks | Episode: "Meet the Parents" |
| Grannie | Miss Hanigan | Short film |
| 2018 | The Guest Book | Loretta | Episode: "Invisible Son" |
