Biografía no disponible
| Año | Título | Personaje | Valoración |
|---|---|---|---|
| 2017 | The Guest Book | Aunt Rose | ★★★☆☆ |
| 2016 | Angie Tribeca | Old Lady | ★★★☆☆ |
| 2013 | Crawlspace | Mrs. Milz | ★★★☆☆ |
| 2013 | Eagleheart: Paradise Rising | Elderly Woman #2 | ☆☆☆☆☆ |
| 2012 | G.C.B. (Golfas, cursis y beatas) | Frusannah Faulkner | ★★★☆☆ |
| 2012 | Veep | Catherine Eaton | ★★★★☆ |
| 2010 | Origen | Old Mal | ★★★★☆ |
| 2009 | Community | Sassy Granny | ★★★★☆ |
| 2009 | Infomercials | Elderly Lady | ★★★★☆ |
| 2008 | True Blood (Sangre fresca) | Olivia | ★★★★☆ |
| 2007 | Reglas de compromiso | Ruth | ★★★★☆ |
| 2007 | Mad Men | Nellie Sterling | ★★★★☆ |
| 2006 | Sons & Daughters | Flo | ★★★☆☆ |
| 2005 | Entre fantasmas | Old Woman Ghost | ★★★★☆ |
| 2005 | Medium | Octogenarian Ariel | ★★★★☆ |
| 2005 | Anatomía de Grey | Babs Martin | ★★★★☆ |
| 2003 | Caso abierto | Mrs. Edino | ★★★★☆ |
| 2001 | Air Rage | Elderly Woman | ★★★☆☆ |
| 2001 | Scrubs | Old Woman | ★★★★☆ |
| 2000 | A Family in Crisis: The Elian Gonzales Story | Sister Jeanne O' Laughlin | ★★★☆☆ |
| 2000 | Son of the Beach | ★★★☆☆ | |
| 1999 | Angel's Dance | Crabby Woman | ★★★☆☆ |
| 1999 | Las fuerzas de la naturaleza | Lady in Wheelchair | ★★★☆☆ |
| 1998 | The Night Caller | Customer | ★★☆☆☆ |
| 1998 | Becker | Mrs. Soloman | ★★★★☆ |
| 1997 | El sueño del rey Midas | Madame Latimer | ★★☆☆☆ |
| 1997 | Ally McBeal | ★★★☆☆ | |
| 1997 | Buffy, cazavampiros | Gypsy | ★★★★☆ |
| 1996 | Sabrina, cosas de brujas | Martha Washington | ★★★★☆ |
| 1995 | El último hombre íntegro | Mrs. Kane | ★★☆☆☆ |
| 1995 | Raging Angels | Old Woman | ★☆☆☆☆ |
| 1993 | Saved by the Bell: The New Class | ★★★☆☆ | |
| 1993 | Yo y el mundo | ★★★★☆ | |
| 1993 | Power Rangers | Grandmother Winslow | ★★★★☆ |
| 1992 | Loco por ti | Pirate Maiden | ★★★☆☆ |
Películas destacadas de Shannon Welles
Estas son las películas más destacadas en las que ha trabajdo:
