Jarecki married Actress Alicia Silverstone on June 11, 2005 in Lake Tahoe, California. Jarecki is a vegan. He coaches youth basketball and advocates for animal rights. He and his wife have four rescue dogs, one of which, a bulldog named The Pig, he shares a bed with.

Jarecki was the singer for S.T.U.N., who toured with Jane's Addiction, The Used, Marilyn Manson and the Warped Tour and played at the Coachella Valley Music and Arts Festival. The band's name stood for "Scream Towards the Uprising of Noncomformity." The political noise-punk group was also named an “Artist to Watch” by Rolling Stone magazine and MTV. He also leads the Los Angeles-based group The Bathroom Murders. The Bathroom Murders released their first album, Anarchiso, in June 2009 and are working on a follow-up in addition to playing live frequently around Los Angeles.

In January 2011, it was announced that Jarecki and Silverstone were expecting their first child together. In May 2011, Silverstone gave birth to a boy, whom they named Bear Blu Jarecki, weighing 7 lbs. 15 oz.

In February 2018 Jarecki and Silverstone split after 13 years of marriage.