| Who is it? | Actress, Writer |
| Birth Day | August 12, 1953 |
| Birth Place | Evanston, Illinois, United States |
| Age | 70 YEARS OLD |
| Birth Sign | Virgo |
| Residence | Studio City, California |
| Occupation | Actress |
| Years active | 1979–present |
| Spouse(s) | Gary Cole (m. 1992, sep. 2017) |
| Children | Mary Cole |
Siddall was born in Evanston, Illinois. Siddall married fellow actor Gary Cole on March 8, 1992. They have a child, Mary Cole, who was born March 16, 1993. They reside in Studio City, California.
