Transatlantic is a progressive rock supergroup consisting of Roine Stolt of The Flower Kings, Pete Trewavas of Marillion and Edison's Children, Mike Portnoy formerly of Dream Theater and Neal Morse formerly of Spock's Beard. They formed in 1999 as a side project to their full-time bands until 2002. They reunited in 2009.
Originally intending to include Fates Warning guitarist Jim Matheos, Morse and Portnoy tapped The Flower Kings guitarist/vocalist Roine Stolt when Matheos was unable to participate. The band completed their lineup by adding bassist and progressive rock veteran Pete Trewavas from the group Marillion and Edison's Children.The name of the group was originally planned to be "Second Nature", but was changed to Transatlantic on suggestion by the cover artist Per Nordin.