During a summer break from NYU, Jerry starred in the feature film Calendar Girl alongside Jason Priestley and Gabriel Olds. He starred in the Canadian science-fiction sitcom My Secret Identity from 1988 to 1991 as the teen hero who develops superhuman traits. In 1987, O'Connell appeared in a commercial for Frosted Flakes. Shortly after turning eleven, he landed his first feature film role as the character Vern Tessio in Rob Reiner's Stand by Me. As a child, he did commercial work for Duncan Hines cookies. O'Connell began his acting career at a young age. While there, he studied screen writing and competed on the fencing team, serving a stint as captain of the sabre squad. He attended New York University from 1991 to 1994, majoring in film. As a teenager, he attended Manhattan's Professional Children's School. O'Connell was raised in Manhattan with his younger brother, actor Charlie O'Connell. Witkowski, the 34th mayor of Jersey City, New Jersey. O'Connell's paternal grandfather was from County Cork, Ireland while his maternal grandmother was from Belfast, Northern Ireland. He is of half Irish, one quarter Italian, and one quarter Polish ancestry. O'Connell was born in Manhattan, the eldest son of Linda, an art teacher, and Michael O'Connell, an advertising agency art director originally from the United Kingdom. Currently, he voices Commander Jack Ransom on the animated series Star Trek: Lower Decks, is co-host of The Talk, and hosts a version of Pictionary syndicated on Fox stations.

He also had a starring role in the comedy horror film Piranha 3D (2010).

He starred as Pete Kaczmarek in the single 2010–2011 season of The Defenders. He is known for his roles as Quinn Mallory in the television series Sliders, Andrew Clements in My Secret Identity, Vern Tessio in the film Stand by Me (1986), Joe in Joe's Apartment (1996), Frank Cushman in Jerry Maguire (1996), Derek in Scream 2 (1997), Michael in Tomcats (2001), Charlie Carbone in Kangaroo Jack (2003), and Detective Woody Hoyt on the drama Crossing Jordan.

Jerry O'Connell (born February 17, 1974) is an American actor and television host.

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