From Wikipedia, the free encyclopedia. James Raymond "Jimmi" Simpson (born November 21, 1975) is an American actor. He has had recurring roles on 24, It's Always Sunny in Philadelphia, Psych, My Name Is Earl and The Late Show with David Letterman, where he appears regularly as "Lyle the Intern". His film credits include The Mother of Invention, Loser, Herbie: Fully Loaded, Stay Alive, Seraphim Falls, Zodiac, The Invention of Lying and Date Night. He is currently starring in Breakout Kings. Description above from the Wikipedia article Jimmi Simpson, licensed under CC-BY-SA, full list of contributors on Wikipedia.