Stowell made his television debut in 2009 playing Jesse on ABC Family's The Secret Life of the American Teenager, which ended up turning into a recurring guest role.

[8] The next year, Stowell appeared in episodes of 90210[9] and NCIS: Los Angeles,[10] before making his feature film debut in 2011 as an ER medic in the drama Puncture starring Chris Evans.

[16] The film follows a promising young drummer enrolling at a cut-throat music conservatory where his dreams of greatness are mentored by an instructor who will stop at nothing to realize a student's potential.

Later in the year, he appeared in Warren as Ted Gordon[citation needed] and Behaving Badly as Kevin Carpenter,[17] before returning to his character Kyle Connellan in Dolphin Tale 2.

[citation needed] In 2015, Stowell starred alongside Edward Burns in the series Public Morals playing the role of Sean O'Bannon.

In November, Stowell portrayed Francis Gary Powers in the Steven Spielberg historical drama Bridge of Spies, which starred Tom Hanks.

[20] In 2016, he played Eddie in In Dubious Battle alongside James Franco and Vincent D'Onofrio,[14] followed by Joel in Colossal with Anne Hathaway and Jason Sudeikis.

[21] In 2017, Stowell starred alongside Dominic Cooper as Hank in Stratton, a film following a British Special Boat Service commando who tracks down an international terrorist cell.

[28] During the holiday season, he would reunite with his Fantasy Island co-star Lucy Hale for the adaptation of Sally Thorne's romance novel The Hating Game where Stowell portrayed Joshua Templeman.