Colin Donnell was born in St. Louis, Missouri, as the youngest of three boys. He has Irish and French ancestry. He played the guitar and took singing lessons when he was 17. His introduction to the stage was in high-school where he was a part of the choir and was in the background juggling and doing circus tricks, which led to being part of his first school musical production of Barnum. Donnell graduated from Indiana University in 2005.\n', '

Donnell has been part of many national stage tours such as Mamma Mia! and Wicked. His first Broadway Theatre performance was in Jersey Boys as Hank Mejewski. His other stage credits include Follies, Meet Me In St. Louis, Anything Goes for which he was nominated for a Drama Desk Award, Johnny Baseball and many more.[clarification needed] Donnell made his television debut by playing Mike Ruskin in the television series Pan Am. In 2012, Donnell was cast as Tommy Merlyn in television series Arrow, however, he left the series after season one as his character gets killed off, but made occasional appearances during seasons two and three. Donnell later returned as his character\'s Earth-X counterpart Prometheus in the crossover special, and as Human Target posing as his character late in season six.\n', '

In July and August 2013, Donnell starred as Berowne in the musical adaption of Shakespeare\'s Love\'s Labour\'s Lost. He also appeared as Elizabeth Banks\' husband in the crime thriller Every Secret Thing, which was released on May 15, 2015.\n', '

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