Of the three adult actresses who played Colleen Carlton, Lyndsy Fonseca remains the most successful. After her time on “The Young and the Restless,” Fonseca went on to play Dylan Mayfair on “Desperate Housewives,” then essayed the part of Katie Deauxma in the “Kick-Ass” series of movies. She might best be known for playing Ted Mosby’s (Josh Radnor) daughter Penny on “How I Met Your Mother,” and Alex on the CW version of “Nikita.” More recently, she recurred on “9-1-1” as Iris Blake, played Laura Turner on the Disney+ version of “Turner and Hooch,” and portrayed Angie Martinelli on “Agent Carter.” 

Adrianne León played Colleen for two years, and she is better known for her work on “General Hospital,” where she originated the adult version of the legacy character Brook Lynn Ashton. She has not appeared onscreen since leaving “General Hospital” in 2011.

Tammin Sursok’s career since playing Colleen hasn’t been much quieter. Before her time on “The Young and the Restless,” she appeared on the Australian soap opera “Home and Away.” While living in L.A. and playing Colleen through her teen years to her adult ones, she found herself co-starring in a number of Disney live-action properties, such as “Aquamarine” and “Hannah Montana,” where she played Sienna for eight episodes. In adulthood, she portrayed Jenna Marshall in “Pretty Little Liars” and had a regular role on the Australian soap opera “Neighbours” in 2022.  Most recently, she popped up in the Tubi original “Blood, Sweat and Cheer” as a mom who poses as her daughter so that she can land a spot on her high school’s cheer squad.