Amell's first role was Daniel Murtaugh in
Cheaper by the Dozen 2, which was filmed in the Muskoka Region of Ontario. Originally meant to be a non-speaking role, he ended up getting a couple of lines. He also appeared in the 2007 horror film
Left for Dead. Amell had a role in the Canadian
Family Channel series
Life with Derek, playing lead character
Casey McDonald's boyfriend Max.
Life with Derek was distributed worldwide, including American
Disney Channel and its international affiliates. He has also appeared in the
ABC Family film
Picture This. Amell had a recurring role on both the
Nickelodeon series
True Jackson, VP as Max Madigan's nephew Jimmy, True's love interest, and the
Cartoon Network series
Unnatural History. He played the role of Noel Kahn's brother Eric on the
ABC Family television series
Pretty Little Liars during the show's third season. Amell has played hockey since he was a child and considered making a career of it until discovering his love of acting. He also takes breakdancing lessons. He had a recurring role on
MTV's
Zach Stone Is Gonna Be Famous. He was cast as
Fred Jones in the 2009 television film
Scooby-Doo! The Mystery Begins, which became the most watched telecast ever on Cartoon Network. He reprised the role in the 2010 sequel
Scooby-Doo! Curse of the Lake Monster. In 2013, Amell received his biggest role to date, lead character Stephen Jameson in CW's sci-fi drama
The Tomorrow People, a remake of the British series of the same name. In May 2014, Amell joined
The DUFF as Wesley. On July 9, 2014, Amell was cast as a major recurring character on the CW series
The Flash as
Ronnie Raymond / Firestorm in the
first and
third seasons, as well as Ronnie's evil counterpart
Deathstorm in the
second and
eighth seasons. In July 2015, Amell was cast in the
tenth season of
The X-Files as FBI Agent Miller. Amell starred alongside
Kevin Spacey and
Jennifer Garner in
Nine Lives, which was released on August 5, 2016. In 2017, he co-starred in
McG's horror film
The Babysitter. He reprised his role in the 2020 sequel,
The Babysitter: Killer Queen. Amell starred in and executive produced the 2019 sci-fi action film
Code 8, with Stephen Amell co-starring and also executive producing. The film, expanding on
an earlier short, was funded by an
Indiegogo campaign which raised over $2 million. He returned to star in and produce the 2024 sequel,
Code 8: Part II. From 2020-2025, Amell starred in
Upload, a science fiction comedy series on
Amazon Prime Video. Amell's performance was cited as a highlight of the series, particularly his chemistry with co-star
Andy Allo and when playing dual roles in the third season. ==Personal life==