Fans have taken to Twitter to question the realism of 18-year-old Wallis Day's portrayal of 14-year-old Holly, who returned to screens this week for Cindy and Tony's wedding.
Responding to the criticism, Waring wrote: "For everyone commenting on the new Holly so what if she looks older than 15! A lot of 15 yr olds look like adults these days!
"If they wanted someone that looked like the old holly they would have cast the old holly!"
Holly Cunningham was previously played by Lydia Waters between 2008 and 2010.
Praising the character's reinvention, Waring insisted: "Wallis Day should be congratulated on landing the role not defending how she looks! She is stunning, great actress and a great addition!"
When a viewer pointed out that Holly had "aged a bit", the actress hit back: "Not really, the actress playing her is only 3 years older as was I when I was 18 and played Cindy at 15."