Pt1 | Katie | Wilkinson | The one reading Suzanne's diary. |
| Guinevere | | Katie's Persian Cat. |
| Merlin | | Katie's Labrador. |
| Suzanne | Bedford | Nicholas' mom. Owner of the diary. Doctor. |
| Nicholas | Harrison | Suzanne's son. |
| Matthew | Harrison | Nicholas' dad. Suzanne's husband. Katie's former lover. |
| Gustavus | | Suzanne's Golder Retriever. |
| Michael | Bernstein | Doctor. Suzanne's ex-boyfriend. |
| Isabelle | | Suzanne's grandmother. |
| Emily | Howe | Suzanne's patient. |
| Dorris | Lathem | Suzanne's patient. |
| Earl | Chapman | Suzanne's patient. |
| Matthew | Wolfe | Suzanne's ex-boyfriend. |
| Laurie | Raleigh | Katie's friend. |
| Robin | | Katie's friend. |
| Susan | Kingsolver | Katie's friend. |
| Gilda | | Katie's friend. |
| Lynn | Brown | Katie's friend. |
| Melanie | Bone | Suzanne's neighbor and friend. |
| Jack | Brandon | George and Lillian Brandon's son. |
| George | Brandon | Jack Brandon's dad. Lillian's husband. |
| Lillian | Brandon | Jack Brandon's mom. George Brandon's wife. |
Pt2 | Jean | | Matthew's mom. |
| | Pugatch | Gustavus' veterenarian. |
Pt3 | Holly | Wilkinson | Katie's mom. |
| John | Macdowell | Local construction worker. |
| Meg | Macdowell | John's wife. |
| Constance | Cotter | Suzanne's doctor. |
| | Leon | Suzanne's cardiologist. |
| Monsignor | Dwyer | Priest, Nicholas' baptism. |
| Dan | Anderson | Pediatrist from Boston. |
| Dr. Phil | Berman | Suzanne's doctor in Boston. |
| Dr. Gail | Davis | Suzanne's Cardiologist in Boston. |
| Michele | Lentini | Suzanne's old bestfriend in Cornwall, New York. |
Pt4 | Bill | Bone | Melanie Bone's husband. |
| Phil | Brown | Lynn Brown's husband. |
| Ashby | Brown | Lynn and Phil's child. |
| Tory | Brown | Lynn and Phil's child. |
| Kelsey | Brown | Lynn and Phil's child. |
| Roscoe | Brown | Lynn and Phil's child. |
| Bailey Mae | Bone | Melanie Bone's child. |
| Albert K. | Sassoon | Katie's Gynecologist. |
Pt5 | Mary | Jordan | Katie's assistant. |
| Larry | | Owner of the publishing company where Katie works.. |