Mizkif, also known as Matthew Rinaudo, is an American Twitch streamer and YouTuber. He is a founding member and co-owner of the gaming organization One True King. He was named Best Just Chatting Streamer at the 2021 Streamer Awards.

Mizkif was born on February 16, 1995, and grew up in Montclair, New Jersey. He is of Italian descent.

Mizkif began streaming in 2016. He streamed to a relatively small community until 2018, when he gained popularity for serving as a cameraman for fellow streamer Paul "Ice Poseidon" Denino.

On April 30, 2019, Mizkif and fellow Twitch streamer and friend Esfand were banned in response to an incident that occurred at PAX East between them and Jenna "Meowri", a streamer and cosplayer, where Mizkif and Esfand made an insensitive joke towards Meowri during a livestream. They were then unbanned seven days later.

In March 2020, Mizkif garnered attention after he made over $5,600 during a sleeping stream. In an interview with Wired, he stated, "Most streams can be very draining. This stream was the opposite. It was very easy. It was honestly a nice break from my normal routine of playing games all day."

Mizkif was the third-most-watched Twitch streamer during the 2020 United States presidential election, trailing fellow streamers Trainwreckstv and HasanAbi.

On October 11, 2020, Mizkif, along with fellow Twitch streamers Asmongold, Esfand, Rich Campbell, and Tips Out, announced the launch of their new gaming organization, One True King.

Mizkif hit one million followers on Twitch on January 18, 2021.