Jack Salvatore Jr. (born October 16, 1989) is an American actor and writer. He is best known for his role as Mark Del Figgalo on Zoey 101.

Salvatore appeared in the 2001 film Donnie Darko, and has guest starred in several television shows, including Judging Amy, That '70s Show, and Still Standing. He is known for his recurring role as Mark Del Figgalo in the Nickelodeon/Family television series Zoey 101 where he appeared in 28 episodes. Salvatore appeared on How I Met Your Mother and had a small role in the Owen Wilson feature Drillbit Taylor.

In the alternate opening and the alternate ending to 13 Going on 30 (2004), Salvatore played young Matt Flamhaff. These alternate clips can be seen on the special features on the DVD. He appeared in an episode of Mind of Mencia and The Secret Life of the American Teenager, and had a recurring role on 10 Things I Hate About You. He also guest starred in the TV show Victorious as the pajelehoocho commercial boy in the episode 'Victori-Yes.' He also worked as the writer's production assistant on shows like Victorious and Sam & Cat.

On January 12, 2023, Jamie Lynn Spears announced that production had begun on a sequel film entitled, Zoey 102, set to premiere in 2023 on Paramount+, with original series cast members Spears, Salvatore Jr., Sean Flynn, Christopher Massey, Erin Sanders, and Matthew Underwood reprising their roles from Zoey 101. Production began in January 2023 in North Carolina. Nancy Hower is currently attached to direct, with Spears attached as executive producer.^[2][3][4] The film was released on July 27, 2023 on Paramount+.^[5][6]

Salvatore Jr. began dating Christine Pemberton in 2015.^[11] They married in February 2021 after 6 years of dating.^[12][13]