Joshua Winslow Groban (born February 27, 1981) is an American singer, songwriter, and actor. His first four solo albums have been certified multi-platinum, and he was charted in 2007 as the number-one best selling artist in the United States, with over 22.3 million records. , he had sold over 25 million records worldwide.

Groban originally studied acting, but switched to singing as his voice developed. He attended the Los Angeles County High School for the Arts, a free public school on the campus of California State University, Los Angeles, where students receive a conservatory-style education. David Foster called him to stand in for Andrea Bocelli to rehearse a duet, "The Prayer", with Celine Dion at the rehearsal for the 1999 Grammy Awards. Rosie O'Donnell immediately invited him to appear on her talk show. Foster asked him to sing at California Governor Gray Davis' 1999 inauguration. He was cast on Ally McBeal by the show's creator, David E. Kelley, performing "You're Still You", later released on his debut album, for the 2001 season four finale. His father is a descendant of Jewish immigrants from Poland and Ukraine, but converted to Christianity from Judaism upon marrying Melinda. His mother's ancestry is English, German, Norwegian, and one quarter Ashkenazi Jewish. At this time, he was more focused on acting, playing Tevye in his high school's production of Fiddler on the Roof. Creator David E. Kelley wrote the character Malcolm Wyatt for Groban in the season finale, aired in May 2001. His performance, including the song "You're Still You", was so popular that the show received upwards of 8,000 emails from viewers. Under Foster's influence, Groban's first album focused more on classics such as "Gira Con Me Questa Notte" and "Alla Luce Del Sole".

Groban performed "There For Me" with Sarah Brightman on her 2000–01 La Luna World Tour, and was featured on her "La Luna" concert DVD. He recorded "For Always" with Lara Fabian for the movie soundtrack of A.I. Artificial Intelligence (2001). He performed in many benefit shows, including "The Andre Agassi Grand Slam Event For Children," alongside Elton John, Stevie Wonder, Don Henley, and Robin Williams; "Muhammad Ali's Fight Night Foundation" which honored Michael J. Fox and others; "The Family Celebration" (2001), which was co-hosted by President Bill Clinton and Hillary Clinton, and David E. Kelley and Michelle Pfeiffer; and Michael Milken's CapCure event, which raised funds for cancer research.

His self-titled debut album Josh Groban was released on November 20, 2001. Over the next year it went from gold status to double-platinum.

2002–2005: Closer

thumb|upright|Groban in concert at the [[Verizon Wireless Arena in Manchester, New Hampshire, July 2007; he is wearing a Manchester Monarchs hockey jersey|right]]

On February 24, 2002, Groban performed "The Prayer" with Charlotte Church at the closing ceremonies of the Winter Olympics in Salt Lake City, and by November, he had his own PBS special titled "Josh Groban In Concert" (2002). In December 2002, he performed "To Where You Are" and sang "The Prayer" in a duet with Sissel Kyrkjebø at the Nobel Peace Prize Concert in Oslo, Norway. He joined The Corrs, Ronan Keating, Sting, Lionel Richie, and others for a Christmas performance at the Vatican. In 2003, Groban performed at the David Foster concert for World Children's Day, singing "The Prayer" with Celine Dion and the finale song, "Aren't They All Our Children?" with artists including Yolanda Adams, Nick Carter, Enrique Iglesias, and Celine Dion.

Groban's second album Closer, produced and written by Foster, was released on November 11, 2003. Groban said he believed that this album was a better reflection of him, and his audience would be able to get a better idea of his personality from listening to it.