The three actresses will lend their voices to roles on the latest episode of the animated comedy, titled "The Hateful Eight-Year Olds". The storyline follows The Simpsons' character Lisa Simpson as she makes a new friend, named Abby - voiced by Joey King. The "Riverdale" stars play "snooty rich girls."
Reinhart and Mendes shared the news with fans on Tuesday, May 5, 2020, taking to social media to post an image of their characters.
"It is truly an incredible, surreal blessing that I was able partake in one of the most iconic television shows ever made," Reinhart wrote on Instagram. "If you're interested in hearing me voice a bitchy eight year old, watch @thesimpsons May 10th at 8pm on FOX."
"Never in my life did i think i'd get to voice a character on the simpsons but here we are!" Mendes added. "it's me, @lilireinhart and @madelame playing mean and annoying 8 yr old girls."