Rylan joined the cast of Guiding Light as Lizzie Spaulding on February 7, 2006 taking over the role from Crystal Hunt, until the finale on September 18, 2009. She won the role of Winnie Harper in the straight-to-video 2006 cheerleading film Bring It On: All or Nothing in which she co-starred with fellow Guiding Light alumnus Hayden Panettiere.
She was also a guest star on the Nickelodeon show Drake & Josh and she has also appeared in several national network commercials. After CBS announced the cancellation of Guiding Light, Rylan joined The Young and the Restless as Abby Newman. Her first airdate was May 18, 2010. She was later absent from the soap during the 2011 holiday season due a maternity leave. In September 2012, it was announced that Rylan had been let go from The Young and the Restless due to budgetary cuts.
She departed onscreen on October 23, 2012 without a proper exit. She returned onscreen on February 11, 2013. Her last air date as Abby was April 10; Melissa Ordway now took over the role. On March 6, 2013, it was announced that Rylan would join the cast of General Hospital as Lulu Spencer, replacing Julie Marie Berman.