She played the role of Jessica Buchanan on the ABC soap opera One Life to Live from February 5, 2003 until the series cancelation in 2012.
Williamson had previously auditioned for the role of Jen Rappaport on One Life to Live, but was rejected because of her resemblance to actress Erin Torpey (the two looked nearly identical), who was playing Jessica Buchanan on the show at the time.
[4] In 2015, Williamson appeared as April Littleton, a photographer going back to her hometown, in Portrait of Love, which premiered on Hallmark Channel on March 7.
In the September 2006 issue of ABC Soaps in Depth, Williamson revealed she had just received her green card and proudly proclaimed, "Now you can't kick me out!
"[10] In 2006 Williamson was a co-host for the Planned Parenthood Awards, which honor individuals and organizations for "their contributions to protecting women's rights.