The Associated Press reports that Thibodeau and Williams will replace Lakers coach Mike D'Antoni and former Blazers coach Nate McMillan, who both served as assistants under Duke's Krzyzewski. Syracuse coach Jim Boeheim will remain on as an assistant.
After initially declaring last summer that he was done as coach of Team USA, Krzyzewski had a change of heart and announced his intention to return as coach through the 2014 FIBA Basketball World Cup in Spain and the 2016 Olympics in Rio de Janeiro.
Thibodeau, 55, is regarded as one of the best defensive coaches in the NBA. A longtime assistant with the Celtics, Thibodeau has amassed a 157-73 (.683) record in three seasons with the Bulls. He's led Chicago to the playoffs in all three seasons, including the 2011 Eastern Conference finals, and was named 2010-11 Coach of the Year.
Williams, 41, is 94-136 (.409) in three seasons in New Orleans. He served as an assistant coach under McMillan in Portland from 2005 to 2010 prior to his hiring by the Pelicans in 2010. At the time of his hiring, Williams was the NBA's youngest head coach. Selected in the first round of the 1994 draft, Williams retired in 2003 with career averages of 6.3 points and 2.8 rebounds in nine seasons with the Knicks, Spurs, Nuggets, Magic and 76ers.
Krzyzewski, 66, has posted a 62-1 record with USA Basketball, with gold medals at the 2008 Beijing Olympics, 2010 World Championships in Istanbul and the 2012 London Olympics.