David Lyons (born 16 April 1976) is an Australian actor. He is known for his roles as Josh Holiday in the Nine Network navy drama Sea Patrol, Dr. Simon Brenner in the NBC medical drama ER and as General Sebastian Monroe in the NBC post-apocalyptic drama Revolution. Lyons was born in Melbourne, Victoria, Australia. Lyons graduated from Yarra Valley Grammar school in 1993 and continued on to graduate from Australia's National Institute of Dramatic Art (NIDA) with a degree in Performing Arts (Acting) in 2004. Lyons starred in the Nine Network police drama Sea Patrol, in which he played the Leading Seaman Josh Holiday for the show's first three series from 2007 until 2009. Lyons began starring in the NBC medical drama ER as Dr. Simon Brenner, making his first appearance in season 14, episode 14 titled "Owner of a Broken Heart" which aired on 10 April 2008, though he was credited as a special guest star. In 2009, Lyons starred in the TV movie A Model Daughter: The Killing of Caroline Byrne. In 2010, Lyons appeared in the biographical film Eat Pray Love, which starred Julia Roberts and was based on the Elizabeth Gilbert autobiography of the same name. In January 2011, Lyons starred as the titular role in the NBC superhero drama The Cape until the show was cancelled in March that same year after ten episodes. Lyons starred in the NBC post-apocalyptic drama Revolution, which ran for two seasons from 17 September 2012 to 21 May 2014 as Sebastian "Bas" Monroe, a former US Marine Corps sergeant who served alongside Billy Burke's character Miles Matheson, founded the Monroe Republic, and became its President and later General of its Militia. In 2013, Lyons co-starred in the romantic drama film Safe Haven opposite Josh Duhamel and Julianne Hough, based on the Nicholas Sparks novel of the same name.

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