| Year | Title | Role | Notes |
| 1992 | The Will Rogers Follies | Ensemble | National Tour |
| 1995 | Grease | Sandy Dumbrowski (replacement) | National tour |
| 1996 | Eugene O'Neill Theatre, Broadway |
| 1997 | Annie | Star To Be/Dog Catcher Cecille/Ronnie Boylan | Martin Beck Theatre, Broadway |
| The Scarlet Pimpernel | Ensemble | Minskoff Theatre, Broadway |
| 1998 | What the World Needs Now | Jennifer | Old Globe Theatre |
| 1999 | Les Misérables | Eponine (replacement) | National Tour |
| 2000 | Dorian | Sister Claire | Goodspeed Musicals, World Premiere |
| Les Misérables | Ensemble u/s Eponine (replacement) | Imperial Theatre, Broadway |
| Thoroughly Modern Millie | Millie Dilmount | La Jolla Playhouse |
| 2001 | The 3hree Musketeers | Constance | American Musical Theatre of San Jose |
| South Pacific | Nellie Forbush | Pittsburgh Civic Light Opera |
| 2002–2004 | Thoroughly Modern Millie | Millie Dilmount | Marquis Theatre, Broadway |
| 2002 | Funny Girl | Fanny Brice | New Amsterdam Theatre, New York Actors Fund Concert |
| 2003 | Chess | Svetlana | New York Actors Fund Concert |
| 2004 | Snoopy! The Musical | Peppermint Patty | Peter Norton Symphony Space Benefit Concert |
| Me and My Girl | Sally Smith | Pittsburgh Civic Light Opera |
| 2005 | Little Women | Jo March | Virginia Theatre, Broadway |
| The Drowsy Chaperone | Janet Van de Graaf | Ahmanson Theatre |
| 2006–07 | Marquis Theatre, Broadway |
| 2007 | Young Frankenstein | Inga | Paramount Theatre |
| 2007–2008 | Hilton Theatre, Broadway |
| 2008 | Shrek the Musical | Princess Fiona | 5th Avenue Theatre |
| 2008–2010 | Broadway Theatre, Broadway |
| 2010 | Anyone Can Whistle | Nurse Fay Apple | New York City Center, Encores! |
| They're Playing Our Song | Sonia Walsk | Gerald W. Lynch Theatre at John Jay College, New York Actors Fund Concert |
| Trust | Prudence | Second Stage Theatre, off-Broadway |
| 2011–2012 | Anything Goes | Reno Sweeney | Stephen Sondheim Theatre, Broadway |
| 2013 | Violet | Violet Karl | New York City Center, Encores! |
| 2014 | American Airlines Theatre, Broadway |
| 2015 | The Wild Party | Queenie | New York City Center, Encores! |
| 2016 | Defying Gravity: The Songs of Stephen Schwartz | Performer | Musical revue; Theatre Royal, Sydney |
| 2016–2017 | Sweet Charity | Charity Hope Valentine | Pershing Square Signature Center, Off-Broadway |
| 2018 | Thoroughly Modern Millie | Millie Dilmount | Minskoff Theatre; 15th Anniversary Reunion Concert, New York Actors Fund Concert |
| My One and Only | Edythe Herbert | Stephen Sondheim Theatre, Roundabout Theatre Company Benefit |
| 2019 | Into the Woods | The Baker's Wife | Hollywood Bowl |
| 2021 | Anything Goes | Reno Sweeney | Barbican Theatre, London |
| 2021–2023 | The Music Man | Marian Paroo | Winter Garden Theatre, Broadway |
| 2024 | Once Upon a Mattress | Princess Winnifred | New York City Center, Encores! |
| Sweeney Todd: The Demon Barber of Fleet Street | Mrs. Lovett (replacement) | Lunt-Fontanne Theatre, Broadway |
| Once Upon a Mattress | Princess Winnifred | Hudson Theatre, Broadway |
| 2024–2025 | Ahmanson Theatre |
| 2025 | Trisha Paytas Big Broadway Dream! (One night only) | Herself | St. James Theatre, Broadway |