He was also an early drama school castmate of Ian McDiarmid who portrayed Emperor Palpatine in the Star Wars Saga. In Star Wars: Episode IV A New Hope, Lawson's voice was dubbed by David Ankrum. He reprised the role, in voice-over form, in the Nintendo GameCube game Star Wars: Rogue Squadron II: Rogue Leader. Lawson's voice also provided the narration for the audio book of Heir to the Empire and Dark Force Rising in both novels, he reprised his role as Wedge Antilles as well as playing all characters. Lawson turned down George Lucas's proposal to make a cameo as Captain Raymus Antilles in Star Wars: Episode III Revenge of the Sith.
Lawson was approached to return as Wedge Antilles for Star Wars: Episode VII The Force Awakens, but declined, stating that it "just would have bored [him]." However, Lawson later claimed that he actually declined to appear in The Force Awakens due to a scheduling conflict, and would have appeared in the film if he had been available. He finally returned to the role in 2019's Star Wars: Episode IX The Rise of Skywalker.
Lawson later voiced Wedge Antilles in the video game Star Wars: Squadrons and the animation series Star Wars: Visions.
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