Jack Davis Griffo^[1] (born December 11, 1996^[2]) is an American actor. He starred as Max Thunderman on the Nickelodeon series The Thundermans (2013–2018). Griffo also had starring roles in the network's original movies Jinxed and Splitting Adam.

Griffo first made appearances as an extra in 2011, on the television series Kickin' It^[3] and Bucket & Skinner's Epic Adventures.^[4] He followed this up with several guest appearances on television series such as See Dad Run^[5] and Jessie.^[5]

From 2013 to 2018, Griffo starred in the Nickelodeon series The Thundermans, where he played Max Thunderman, the twin brother who strived to become a supervillain (his twin sister Phoebe is played by Kira Kosarin).^[5][6] The same year Griffo also starred along with Ciara Bravo in the Nickelodeon original film Jinxed.^[7]

Griffo starred alongside Isabela Moner, Tony Cavalero, and Jace Norman in the Nickelodeon original movie Splitting Adam, which aired in February 2015.^[8] He played the role of Billy, the boyfriend of Fin Shepard (Ian Ziering)'s daughter Claudia Shepard (Ryan Newman), in the Syfy original movie Sharknado 3: Oh Hell No!, which premiered on July 22, 2015.^[9] In 2016, Griffo guest-starred in the season 7 finale of NCIS: Los Angeles as a military cadet named McKenna.^[10]

In 2017 Griffo played the role of Sebastian in the inspirational family drama film Apple of My Eye (originally titled And Then There Was Light).^[11] The same year, he was cast as Noah in the indie drama film Those Left Behind.^[12] In August 2017 Griffo was added to the cast of the Netflix original series Alexa & Katie, playing the recurring role of Dylan.^[13]

Griffo has a YouTube channel where he posts music covers. As of January 2017, the channel has over 96,500 subscribers and over 8.60 million views.^[14] Griffo released a single, "Hold Me", with his friend Kelsey, on October 17, 2011.^[15] The music video for "Hold Me" was released on October 29, 2011, and received over 4 million views.^[16] He released his solo debut single, "Slingshot", on November 13, 2013, which features Douglas James.^[17] The music video for "Slingshot" was released on Griffo's YouTube channel on January 14, 2014, and has received over 1.8 million views.^[18]

Griffo has been nominated for five Kids' Choice Awards for Favorite TV Actor, the first in 2014,^[20][21] the second in 2015,^[22] the third in 2016,^[23] the fourth in 2017,^[24] and the fifth in 2018.^[25]