Lawson was born in Brisbane, Queensland, Australia. He attended St. Joseph's College, Gregory Terrace and is a graduate at the National Institute of Dramatic Art. He may be best known for his starring role as Frazer Yeats in the Australian soap opera Neighbours from 2006 to 2008, which earned him a nomination for the "Most Popular New Male Talent" at the 2007 Logie Awards. He played a small role as Sam in the 2011 film No Strings Attached and a recurring role as Benjamin in the ABC sitcom Don't Trust the B---- in Apartment 23 in 2012. In 2017, he played District Attorney Peter Garrett in Doubt. He currently has a starring role in the TV series Designated Survivor.
- He won the Logie Award for Most Popular New Male Talent in 2007.
- The names of his siblings are Josh, Matt, and Jordan.
- He starred alongside Natalie Portman and Ashton Kutcher in the film No Strings Attached.
- "The First Polaroid"
- "Two Girls Kissing"
- "The Chalk Machine"
- "The Smile at the End of the Dock"
- "Smile, Bitches"
- "Bryce and Chloe"
- "The Box of Polaroids"