Thomas Ian Nicholas (born July 10, 1980) is an American film actor, singer, musician, producer, director, and writer. Nicholas is best known for playing Henry Rowengartner in Rookie of the Year, Walt Disney in Walt Before Mickey and Kevin Myers in the American Pie film series.
Nicholas was born in Las Vegas, Nevada. His mother, Marla, is an acting school administrator and professional dancer. He is of Italian (from his paternal grandfather), German, Irish, and English descent. Nicholas has six siblings.Thomas Ian Nicholas Biography|TVGuide.com Thomas Ian Nicholas Biography (1980–) 
Nicholas is known for his roles in Rookie of the Year (1993) and American Pie (1999). He appeared in the four theatrical films of the American Pie franchise, as the character Kevin Myers, played Frank Sinatra, Jr. in the Showtime movie Stealing Sinatra, and co-starred in Halloween: Resurrection. In 2009, he played the role of a rookie cop in the drama Life Is Hot in Cracktown. He played Eugene in Nicole Holofcener's Please Give, which won the 2011 Indie Spirit Robert Altman Award. He had the role of Abbie Hoffman in the film entitled The Chicago 8. He also appeared on an episode of ABC's Grey's Anatomy as Jeremiah. "I started acting when I was 6 years old. I have always enjoyed making people laugh or smile or think," he says.
Nicholas released his debut album, Without Warning, on January 15, 2008, and his follow-up album, "Without Warning Acoustic" on February 28th, 2009. Heroes Are Human, on June 1, 2010. His fourth release is a self-titled EP, released March 20, 2012, in which the first single "My Generation" is also on the "American Reunion" soundtrack album. His fifth release is the EP "Security" released on April 8th, 2014. About his music career, he has said that "I started playing guitar when I was 14. I couldn't stop playing... I am very blessed and thankful for all that has happened." He also appeared in Mallory Knox's music video for their song "Wake Up".
On June 30, 2010, Nicholas threw out the first pitch at the Chicago Cubs game at Wrigley Field and sang the seventh-inning stretch.http://www.imdb.com/name/nm0005272/ "Film Independent Spirit Awards – Saturday, February 26, 2011 at 10P E/P on IFC". Ifc.com. February 26, 2011. Retrieved December 10, 2011. MySpace.com – Thomas Ian Nicholas -Album Out Now!!! – San Fernando Valley, California – Rock / Acoustic – www.myspace.com/thomasiannicholas – www.tinband.com
Nicholas married Colette Marino, known as DJ Colette in 2007. The couple welcomed their first child, a boy named Nolan River, in 2011.http://www.ontheredcarpet.com/Thomas-Ian-Nicholas-of-American-Pie-welcomes-son/8401951