He starred as Max Thunderman in the TV series The Thundermans and also appeared in the series Kickin' It and Marvin Marvin. Additionally, he starred as Brett in the 2013 TV movie Jinxed and he played Billy in the 2015 movie Sharknado 3: Oh Hell No! In 2015 he appeared on Nickelodeon's Ho Ho Holiday Special.
Television and Film Roles
|2011||Sound of My Voice||Young Peter||Film|
|2011||Kickin' It||Benny||Episode: "All the Wrong Moves"|
|2011||Bucket and Skinner's Epic Adventures||Surf Team Member||Episode: "Epic Musical'|
|2012||American Hero||Big Brother||Featured Role|
|2013||Marvin Marvin||Ellis||Episode: "Scary Movie"|
|2013||Jessie||Brett Summers||Episode: "Somebody's in Trouble"|
|2013||See Dad Run||Xander McGinley||Recurring Role; 3 episodes|
|2013||Jinxed||Brett O'Leary||Television film (Nickelodeon)|
|2014||Haunted Hathaways||Max Thunderman||Crossover episode: "Haunted Thundermans Part 2"|
|2014||Awesomeness TV||Himself||Episode: "Teen Challenge"|
|2015||Nicky, Ricky, Dicky & Dawn||Himself||Episodes: "Go Hollywood Part 1-2"|
|2015||Splitting Adam||Vance Hansum||Television film (Nickelodeon)|
|2015||Sharknado 3: Oh Hell No!||Billy||Television film (Syfy)|
|2015||Nickolodeon's Ho Ho Holiday Special||Jack Griffo||Television Film (Nickelodeon)|
|2016||NCIS: Los Angeles||McKenna||Episode: "Talion"|
|2016||Henry Danger||Max Thunderman||Crossover episode: "Danger & Thunder"|
|2016||Those Left Behind||Noah||Film|
|2016-2017||Paradise Run||Himself||Contestant, 7 episodes|
|2017||Apple of My Eye||Lead||Lead Role|
|2017||The Dude Perfect Show||Himself||Episode: "Velcro Dodgeball, Trust"|
|2017||Nickelodeon's Sizzling Summer Camp Special||Jack||Television Film (Nickelodeon)|
|2018||Love Daily||Paul||Episode: "Paul's Broken Heart"|
|2018||The Loud House||Tristan||Voice role; Episode: "Fandom Pains"|
|2018||School of Rock||Slade||Episodes: "I love Rock and Roll, Parts I & II"|
|2013-2018||The Thundermans||Max Thunderman||Main Role|
|2018||Lip Sync Battle Shorties||Himself||Episode: "Catwalk/Jungle/Girls Night Out"|
|2018||Knight Squad||Sir Swayze||Episode: "Working on the Knight Moves"|
|2018||Best Worst Weekend Ever||Jumping Jack Lightning||2 episodes|
|2018-2019||Alexa and Katie||Dylan||Recurring Role (Seasons 1, 3); Main role (Season 2); 13 episodes|
|2019||Spongebob's Big Birthday Blowout||Himself||Television special|
|2020||Donut Baby||Glaze||TV Pilot|
|2020||SEAL Team||PV2 Elliot Moundst||Episode: "Drawdown", "Edge of Nowhere"|
|2020||The 2nd||Shawn Davis||Film|
|2020||The Christmas High Note||Todd||Movie|
|2021||Overrun||Auggy Riggs||Film; post-production|
|TBA||Sid Is Dead||Eric Worsham||Film; post-production|
|TBA||Don't Log Off||Jacob||Film; currently filming|
|TBA||Life in LA||Gary||"It's Not Your Fault"; pre-production|
- He can play the guitar.
- He loves summer camp.
- He is the youngest of five siblings.
- He has a great sense of direction.
- Jack said if he were a real-life superhero, he would want to have invisibility.
- On YouTube, he has a channel featuring him performing covers of pop songs. He has around 200.00 subscribers.
- One of his most popular cover songs was the song "Hold Me," which he performed with Kelsey Lee Smith.
- He is dating Paris Berelc who co-starred with him on the Netflix Original show Alexa & Katie. Berelc and Griffo's Alexa & Katie's characters, Alexa and Dylan, dated in Seasons 1 and 2 but broke up. Berelc and Griffo started dating in 2016, but broke up in 2018. They came back again in 2020.
- Jack also dated Kira Kosarin, his co-star in The Thundermans, for a short time.