The Am I Actually the Strongest? TV anime adaptation has revealed the main voice cast, along with the staff and a July premiere date. Studio Staple Entertainment is in charge of the animation, with Takashi Naoya as the director. You can see the key visual for the anime which features the main trio:
The main character Haruto will be voiced by Ayumu Murase. His younger sister Charlotte Zemphis will be voiced by Atsumi Tanezaki and his follower Flay will be voiced by Ayaka Shimizu.
The Am I Actually the Strongest? (Jitsu wa Ore, Saikyo Deshita?) series was first published the Shosetsuka ni Naro website in September 2018 before being acquired by Kodansha. It was published as a light novel with illustrations by Ai Takahashi. There is also a manga adaptation with art by Takahashi. The manga has been serialized by Kodansha since May 2019.
Kodansha USA has licensed the manga in English for North America, and they describe the story:
To be reincarnated into another world with the promise of a “cheat” power is one thing… but to be reborn as a baby, and then left for dead after your royal parents think you’re powerless?? That’s another thing entirely! Now the newly-born Reinhart—or Hart to his new friends—must find his way through a dangerous world…but luckily he’s got magic that’s quite literally off the charts!
Source: Official Twitter
© Sai Sumimori, Kodansha / “Am I Actually The Strongest?” Production Committee