Has a son, August Manning Weatherly (born January 10, 1996) with ex-wife Amelia Heinle.
Son of Michael Manning Weatherly, Sr., who made millions as the American importer of the Swiss Army Knife, and Patricia, a hospital administrator.
Was engaged to Dark Angel (2000) co-star Jessica Alba. In a 2008 interview with Elle Magazine, Alba called Weatherly her "first love" and heavily hinted that she lost her virginity to him.
Attended Fairfield Country Day School in Fairfield, Connecticut.
Played in a band to supplement his acting in the early days of his career. He plays guitar and piano. He also sold shoes, delivered pizzas, dabbled in songwriting and also worked in the videotape library of ABC. A big part of his job there was to log and cart around one-inch reels of videotape.
He is the uncle of actress Alexandra Breckenridge, from Dirt (2007) and She's the Man (2006). Alexandra's mother is Michael's half-sister (they share the same mother).
Attended the TV Week Logies on May 6, 2007 as an international guest for Channel 10. The Logies were held in the Crown Casino Complex in Melbourne, Australia. Michael was accompanied by his niece, Alexandra Breckenridge .
Took his mom (Patricia O'Hara) to see Borat.
Played "Robert Wagner" in The Mystery of Natalie Wood (2004). Robert Wagner plays Michael's character's father on NCIS (2003).
1986 graduate of Brooks School located in North Andover, MA.
When NCIS (2003), in which he stars, wanted to release a soundtrack, they invited him to record a song. He recorded "Bitter and Blue". The success of the song led to Michael recording several more songs, including "Pretty Baby", "All Fall Apart", "Lovlihead", and "Suffer for Me".
Michael and his wife Bojana have two German Shepherds named Oriana and Quantum.
Michael attended Boston University, American University in Washington DC, American University in Paris for one semester and Menlo College (studied communications) before dropping out of college to pursue an acting career.
Michael had two nominations in the Soap Opera Digest Awards. The first one was for Hottest Male Star for the series Loving in 1994 and the second nomination was for Outstanding Younger Lead Actor for the series Loving in 1995.
His comedic influences, when he was young, were Steve Martin, Robin Williams, David Letterman and Bill Murray.
Favorite authors are Martin Amis, Saul Bellow and Philip Roth. He also likes to read biographies.
On January 13, 2012, Michael Weatherly announced he and his wife, Bojana Jankovic, are expecting a baby girl in the spring.
Has a daughter, Olivia Weatherly (born April 10, 2012), with Bojana Jankovic.
Has a son, Liam Weatherly, born October 29, 2013, with Bojana Jankovic.
Had a falling out with his father and was disinherited from the family fortune when he told his parents he was going into acting professionally. The falling out and disinheritance were written into the background of his character Anthony DiNozzo on NCIS.
Step-cousin of Allison Janney.
(January 5, 2016) Weatherly announced his retirement from NCIS, effective at the end of the 2015/2016 season after thirteen full seasons portraying NCIS Special Agent Anthony DiNozzo, Jr.
He is of English and Irish descent.
His acting mentor is [David McCallum].