Cowan is the younger brother of author Roberta Bondi, older brother of History Detective Wesley Cowan and first cousin of Kassie Wesley DePaiva.
In 2005 she was the casting director of the short film Exit in which she cast actors from her previous soaps, Kassie DePaiva, who plays Blair on One Life to Live, and Jack Scalia, who played Christopher Stamp on All My Children.
DePaiva has been married to fellow One Life to Live actor James DePaiva since May 31, 1996 and gave birth to their son, James Quentin DePaiva, on May 12, 1997.
•
On Monday, November 29, 1993, she began portraying her most notable role, the part of Blair Daimler Cramer on One Life to Live, formerly portrayed by half-Asian actress, Mia Korf.
On January 11, 2012, it was announced that Alderson, along with former co-stars Kassie DePaiva, Michael Easton, and Roger Howarth, would reprise her One Life to Live role on ABC's sole remaining soap opera General Hospital.