NEWSMAKERS: Leo DiCaprio’s Family Drama

The 28-year-old stepbrother of “Titanic” superstar Leonardo DiCaprio is in a Los Angeles area jail today on $1 million bail. The allegation: Suspicion of attempted murder.

Adam Farrar, himself an actor, who appeared in the controversial kiddie-bank-robber indie flick “Pups,” was arrested about noon Wednesday at a home in Marina Del Rey, Calif., after an alleged attack on his girlfriend, the Los Angeles County Sheriff’s Department says.

Leonardo DiCaprio Upon being taken into custody, Farrar told deputies he was Leo‘s stepbrother. While the familial factoid is true (Leo‘s camp confirmed as much today), authorities say they’re not sure why Farrar offered that by way of ID info.

In addition to the attempted-murder booking, Farrar was also accused of making “terrorist threats” against his (unidentified) girlfriend.

Farrar (listed in the credits of “Pups” as “Ferrar”) and DiCaprio are not related by blood. They became family when Farrar’s bodybuilder mother married DiCaprio‘s underground-comic-guru father. Farrar was the first star of the family, doing commercials as a kid. He later left acting for other pursuits, including a stint in the Army.

In 1999, he was named one of Hollywood’s “30 Under Thirty” to watch by TNT’s Rough Cut movie Web site ( “I would love to work with [DiCaprio],” Farrar told the site. “I’m leaving all my options open at this point.”

It wasn’t known if DiCaprio, 25, was aware of Farrar’s current straits. “He has no comment,” DiCaprio‘s publicist, Ken Sunshine, said today of the actor.

TRAGEDY: Mia Farrow is mourning the loss of her 19-year-old child, who died last weekend of a cardiac arrest, it has been revealed. Tam Farrow — born in Vietnam and adopted by Farrow in 1992 — had a history of medical problems. She was blind and had been hospitalized as recently as last week in Connecticut. Mia Farrow, 55, is almost as famous for raising a seemingly unmanageable brood of children as for her films (“The Purple Rose of Cairo,” “Death on the Nile“) or for her tabloid-friendly breakup with longtime love Woody Allen in 1992. Tam Farrow was one of the actress’ 14 children — 10 of whom are adopted. Farrow is also a grandmother by estranged daughter Soon-Yi. Allen, 64, and Soon-Yi adopted a child of their own in 1998.

OSCAR WATCH: Mel Gibson has enlisted to present, and supermodel Tyra Banks and MTV News’ Chris Connelly have enlisted to co-host, ABC’s red-carpet arrivals parade (now dubbed “Countdown to Oscars 2000”) with “The View” gabber Meredith Vieira. Most disturbingly, Ray Charles, Isaac Hayes, Whitney Houston, Queen Latifah and baseball player Garth Brooks have enlisted to perform a “special song medley” on the main telecast. For this they ditched the dance numbers?

GOOD COUNTRY PEOPLE: Singer Faith Hill (“Breathe”) lassoed eight nominations, including one for best entertainer, as the field for the TNN Music Awards was announced today. Hubby Tim McGraw scored five. Winners will be announced June 15 in Nashville.

THE SIMILARITIES ARE STARTLING? A Pennsylvania woman has filed a federal lawsuit against the author of the mega-selling-soon-to-be-a-major-motion-picture “Harry Potter” series, claiming that J.K. Rowling ripped off her non-mega-selling-not-soon-to-be-a-major-motion-picture 1984 novel, “The Legend of Rah and Muggles.”

PEOPLE WHO GET PERMITS ARE THE LUCKIEST PEOPLE IN THE WORLD: Barbra Streisand and hubby James Brolin have gotten the go-ahead from the Malibu City Council to rip down one of their houses and build a new one in its place. That’s what rich people call spring cleaning.