Hayley Erin (born Hayley Erin Feil on July 13, 1994) was born in Los Angeles, California, U.S. Erin's first acting role was in 2004 when she guest starred on an episode of Malcolm in the Middle. She was also seen on the FOX sketch show MADtv in eight sketches—Celebrity Quarters and a fake movie trailer for It's A Small World as Dakota Fanning. Erin has guest starred on The District, Emily's Reasons Why Not, Two and a Half Men, Modern Family, Austin & Ally and recently guested on NCIS.

In 2003, Darcy Rose Byrnes began portraying the character on both The Young and the Restless and The Bold and the Beautiful. Byrnes' run came to an end in June 2008 when Noah Newman was aged to a teenager, and Abby's character was soon to follow. In December 2008, it was announced that Erin had been cast to portray a teenaged version of the character. In March 2010, it was announced that the character had been rapidly aged again to an adult, with Marcy Rylan scheduled to join the cast. Erin made her final appearance on April 14, with Rylan's debut on May 18, 2010.

In January 2015, it was announced that she had been hired to portray the role of Kiki Jerome on General Hospital, replacing original actress Kristen Alderson in the role.