|Days of our Lives|
|Portrayed by|| Alison Sweeney (2007; in flashbacks/visions)|
Shirley Jones (2008)
|Current status||Former; Recurring|
|First appearance|| June 2007 (in flashbacks)|
January 31, 2008
|Last appearance||February 7, 2008|
|Nickname(s)||Leenie (by Shawn)|
|Cause of death||Natural causes|
|Residence||Formerly, Salem, Illinois|
Colleen was first seen in flashbacks in 2007. She was training to be a nun, and devote her life to God. One day, two church workers found a man named Santo DiMera. Colleen cared for Santo, and he was instantly smitten with her. Colleen rejected Santo's advances at first, but eventually fell for him after Santo told her his wife had died. Colleen made love to him, violating her oath, and accepted that she loved Santo.
Stefano DiMera revealed to Shawn Brady that his mother was alive, and Santo had lied to her. Colleen broke up with Santo, and went through with her commitment as a nun. However, she saw Santo and Stefano pass by the church, and after him. Colleen's habit was found by the cliff side and she was presumed to have committed suicide. In actuality, Colleen found out she was pregnant with Santo's child and was so ashamed that she faked her death. Colleen ended up giving up her and Santo's child.
Colleen's actions would have lasting consequences as Stefano blamed her for ruining his family, and causing Santo to die of a broken heart. Stefano eventually grew up into a powerful crime lord, and targeted the Brady family for revenge. This wasn't revealed until 2007 and Roman Brady always assumed Stefano was mad at Roman for ruining his operation. At some point, Stefano learned Colleen was alive, and after telling Shawn that he had intentionally told him the truth to break up Colleen and Santo, Shawn almost got even by turning off Andre DiMera's life support until a vision of Colleen reminded him that she wouldn't want that. Colleen also appeared to her great-niece Sami Brady and encouraged her to be with Stefano's son, EJ DiMera, as the two them were the spitting image of her and Santo.
In 2008, Stefano brainwashed John Black because he had discovered that he was Santo and Colleen's son. Stefano's plan was for John to kill Colleen, but Colleen ended up dying peacefully surrounded by her family and reunited with Shawn. John would later discover that he was not Santo and Colleen's son, and that their child had died years ago.