Itagaki Mizuki is a Japanese actor, singer and fashion model. He is a former member of the idol boy band M!LK and is affiliated with Stardust Promotion.

At the age of 10, Mizuki was scouted by Stardust Promotion when he and his mother were on their way home from shopping. He later joined EBiDAN when he was 11. He appeared in Fujifabric music video as his debut work.

In 2014 he made his movie debut in Dark Gold Ushima-kun Part 2. As well as getting a major role in Solomon's Perjury as Kazuhiko Kambara, which was released in 2015.

In 2014 he officially became a member of M!LK. In January 2020 he graduated from M!LK.