March 12, 1980 
Phoenixville, Pennsylvania, U.S.
|Years active||2001 – present|
Lavoisier is known for his role as Rex Balsom on the ABC soap opera, One Life to Live. He has portrayed this character since 2002. During that same year, he also appeared in the horror movie Wolves of Wall Street. Lavoisier is a member of the advisory board of theatre production company Streetlight Productions, Inc, and has performed in various off-Broadway plays including Discordant Duets and Counterfeit Garden.
He was born John-Paul Seponski in Phoenixville, Pennsylvania and attended Phoenixville High School, before going on to the University of the Arts in Philadelphia, where he studied music performance, particularly the drums.
His hobbies include tennis, skiing, golf and magic tricks. He dislikes running and the suburbs, and claims to be anally retentive. For ABC's Fan February events in 2007, he switched jobs with a fan who is a dance teacher.
|2001||All My Children||Orderly||Episode Dated:
|Sex and the City||Model||Episode:
Coulda, Woulda, Shoulda
Extra at fashion show in The Real Me
|2002-2012||One Life to Live||Rex Balsom||Episodes Aired:
|One Day in May||Matt Daniels||TV-movie|
|Wolves of Wall Street||Barnes||as John Paul LaVoisier|
|2003||Saturday Night Live||Himself||Episode Dated:
Jeff Gordon/Avril Lavigne
August 22, 2003
June 9, 2004
March 17, 2005
June 12, 2006
|The View||Himself||Episodes Dated:
March 12, 2003
April 30, 2008
|2004||Soap Center||Himself||Episode Dated:
|2007||Gossip Girl||Field Hockey Coach||Episode:
|6ABC Boscov's Thanksgiving Day Parade||Himself||TV|
Human Lab: Soap Star Edition
|The 35th Annual Daytime Emmy Awards||Himself-Presenter||TV|
|The Mentalist||Chad Carmichael||Episode Dated: October 27, 2011|
- John-Paul Lavoisier biography - IMDb.com
- Streetlight Productions, About Streetlight (retrieved May 2, 2006)
- "First Look at DIRTY SOAP". SoapOperaDiegst.com. 2011-08-27. Retrieved 2011-08-26.
- Dawn, Randee. "Rex and the City." Soap Opera Digest, 1 April 2003. (retrieved 24 January 2008)
- About.com biography, October 2002 (retrieved May 2, 2006)
- John Paul Lavoisier Web - selected quotes from Soap Opera Weekly (retrieved May 2, 2006)
- "Trading Places". Soap Opera Weekly. 2007-02-13. p. 18.
- Flynn, Lauren. "Two Cute." Soap Opera Digest. September 16, 2008, Vol. 33, No. 38, pg. 48-52.
- "ask us". Soap Opera Digest. p. 90.