Downey: 'Safe' behind bars

Robert Downey Jr. is an "Iron Man" indeed: The bad boy actor admits he felt the safest he's ever been when behind bars.

"When the door clicks shut, then you are safe," says the veteran actor, who spent a good amount of time between 1996 and 2001 in prison for drug use and possession. "There is nothing aside from a rogue correctional officer that can do you harm if you have the right cellie. You are actually in the safest place on Earth. Safe from the intruders."

For Downey, those intruders were his addictions — which started when his father, Robert Downey Sr., reportedly began giving him drugs when he was just 8 years old.

In the upcoming issue of Rolling Stone, Downey talks about everything from doing cocaine with his pops and — drumroll, please —Jack Nicholson , to his eventual downward spiral into heroin addiction.

Now sober for seven years, Downey plans to stay that way. "The ramifications of a little slip are not what they used to be," he says. "It's not kid stuff anymore."

Kinnear, Holmes to play Kennedys

Greg Kinnear and Katie Holmes will star in "The Kennedys," the History Channel's first scripted miniseries.

The channel announced Wednesday that Kinnear will play President John F. Kennedy, and Holmes will portray first lady Jacqueline Kennedy in the eight-hour program about the famous family.

Barry Pepper is set to play Robert Kennedy, who served as U.S. attorney general in his brother's administration. Tom Wilkinson is cast as patriarch Joseph Kennedy.

The miniseries is scheduled to air in 2011.

Condon to direct 'Twilight' film

Director Bill Condon , who already knows something about gods and monsters, is set to direct the fourth and final film in the "Twilight" series, "Breaking Dawn."

Summit Entertainment, which is releasing the popular vampire franchise, said Wednesday that Condon would take the helm for the latest installment. The script is being written now, with stars Kristen Stewart, Robert Pattinson and Taylor Lautner returning.

Condon won an Oscar for the screenplay of his 1999 film "Gods and Monsters." He also directed "Dreamgirls" and "Kinsey" and produced the 2009 Academy Awards ceremony with Hugh Jackman as host.

The third film in the series based on Stephenie Meyer's books, "The Twilight Saga: Eclipse," is set to come out June 30.

Letterman forms label

David Letterman is getting into the music business.

His production company, Worldwide Pants Inc., has formed its own record label and already has its first act.

Clear Entertainment/ C.E. Music will release the debut album from the punk duo Runner Runner this summer. Their self-titled album is being released through a new partnership with Letterman's label, EMI Music's Capitol Records and MRV label.

The band, from Huntington Beach, Calif., will begin touring next month.

Another year older

Today's birthdays: Actress Cloris Leachman , 84... singer Willie Nelson , 77... actor Gary Collins , 72... actor Burt Young , 70 ... singer Bobby Vee , 67... actress Jill Clayburgh , 66 ... actress Kirsten Dunst , 28.