In the anime 'Naruto', who was the youngest member of the terrorist group 'Akatsuki'?

Deidara was an S-rank missing-nin from Iwagakure. During his time in the village, he was a member of the Explosion Corps. After defecting from the village, he was forced into Akatsuki and was its youngest member. There, Deidara was partnered with Sasori until the latter's death, and later with Tobi before his own death.

Deidara referred to his explosive ninjutsu as art, usually quoting "Art is an Explosion!" and seeing each bomb he made to be a significant accomplishment. He referred to his style as super flat (referring to certain types of art), and claimed pop (another art style) is dead. He would often boast about his works of art, even towards his opponents in battle. Deidara's pride as an artist makes him simply unwilling to accept that anything could defeat it, leading to his abandonment of strategy during his battle with Sasuke Uchiha, in favor of tactics that let him show off his art. He was able to recognize stronger opponents like Itachi, although he felt that the Sharingan was inartistic, and despised the fact that he had been enthralled by its Genjutsu.