Answer the question at the end by quoting:

Christensen was born in Vancouver, British Columbia, to Alie, an American speechwriter, and David Christensen, a Canadian computer programmer and communications executive. His father is of Danish descent, and his mother has Swedish and Italian ancestry. Christensen is one of four children, with three actor siblings: older brother Tove, older sister Hejsa, and younger sister Kaylen. Christensen was an athlete in high school, playing hockey competitively and tennis on a provincial level.
On May 12, 2000, Christensen announced that he would be starring as Anakin Skywalker in Star Wars: Episode II - Attack of the Clones (2002) and Star Wars: Episode III - Revenge of the Sith (2005). The casting director reviewed about 1,500 other candidates before director George Lucas selected Christensen. Lucas is quoted as saying that he chose Christensen because he "needed an actor who has that presence of the Dark Side". This was essential to solidify the story that Lucas was trying to tell: Anakin Skywalker's fall from grace and transformation into Darth Vader. During the production of Revenge of the Sith, Christensen asked Lucas if a special Vader suit could be constructed to fit his own body, rather than have a different actor don one of the original sets of Vader armor worn by David Prowse. Lucas agreed, and a suit was engineered to fit Christensen's frame, even including extensions to allow for the actor to attain Vader's 6 ft 6 in (1.98 m) height. His voice as the "robotic" Vader, however, was dubbed over by James Earl Jones, who first made the voice famous in the original trilogy. Stock footage of Christensen was used in the 2004 DVD-release edition of Return of the Jedi, where he was inserted to replace Sebastian Shaw as the ghost of the redeemed Anakin Skywalker. This was one of the most controversial changes. Lucas wanted Anakin's inner person to return to who he was before he turned to the dark side. Christensen insisted this was done without his knowledge, an act that was confirmed by Lucasfilm itself in the featurette "Return of the Jedi: What has changed?" as seen on the official website to commemorate the 2006 DVDs. His performance in both Episode II and III received generally mixed reviews by critics (earning him the Golden Raspberry Award for Worst Supporting Actor in both films). Christensen was named in both People magazine's 50 Most Beautiful People and Teen People's 25 Hottest Stars under 25. For his performance in Episode III, he won the MTV Movie Award for Best Villain.

Did he act in any other movies during this time?

IN: John William Carson (October 23, 1925 - January 23, 2005) was an American television host, comedian, writer, and producer. He is best known as the host of The Tonight Show Starring Johnny Carson (1962-1992). Carson received six Emmy Awards, the Television Academy's 1980 Governor's Award, and a 1985 Peabody Award. He was inducted into the Television Academy Hall of Fame in 1987.

Carson began his broadcasting career in 1950 at WOW radio and television in Omaha, Nebraska. Carson soon hosted a morning television program called The Squirrel's Nest. One of his routines involved interviewing pigeons on the roof of the local courthouse that would report on the political corruption they had seen. Carson supplemented his income by serving as master of ceremonies at local church dinners, attended by some of the same politicians and civic leaders whom he had lampooned on the radio. The wife of one of the Omaha political figures Carson spoofed owned stock in a radio station in Los Angeles, and in 1951 referred Carson to her brother, who was influential in the emerging television market in southern California. Carson joined CBS-owned Los Angeles television station KNXT. In 1953, comic Red Skelton--a fan of Carson's "cult success" low-budget sketch comedy show, Carson's Cellar (1951 to 1953) on KNXT--asked Carson to join his show as a writer. In 1954, Skelton during rehearsal accidentally knocked himself unconscious an hour before his live show began, and Carson successfully filled in for him. In 1955, Jack Benny invited Carson to appear on one of his programs during the opening and closing segments. Carson imitated Benny and claimed that Benny had copied his gestures. Benny predicted that Carson would have a successful career as a comedian. Carson hosted several shows besides Carson's Cellar, including the game show Earn Your Vacation (1954) and the CBS variety show The Johnny Carson Show (1955-1956). He was a guest panelist on the original To Tell the Truth starting in 1960, later becoming a regular panelist from 1961 until 1962. After the prime time The Johnny Carson Show failed, he moved to New York City to host Who Do You Trust? (1957-1962), formerly known as Do You Trust Your Wife?. In 1958, he appeared as a guest star in an episode entitled "Do You Trust Your Wife" on NBC's short-lived variety show, The Polly Bergen Show. On Who Do You Trust?, Carson met his future sidekick and straight man, Ed McMahon. Although he believed moving to daytime would hurt his career, Who Do You Trust? was a success. It was the first show where he could ad lib and interview guests, and because of Carson's on-camera wit, the show became "the hottest item on daytime television" during his five years at ABC.

what did he do on early radio?

OUT:
hosted a morning television program called The Squirrel's Nest.