Veteran actor Robert Wagner wants part of Drew Barrymore’s pie.

The former “Hart to Hart” star, 73, claims he helped develop the original 1970’s “Charlie’s Angels” TV series and is suing for half the profits from the “Angels” movies, starring and executive produced by Barrymore, reports Reuters.

According to his legal papers, Wagner’s involvement with “Angels” began when he and his (now deceased) wife Natalie Wood agreed to star in the 1974 TV movie “Love Song” (later called “The Affair”) for producers Aaron Spelling and Leonard Goldberg — who then allegedly gave Wood and Wagner part interest for five TV shows, one of which became the 1976-81 series “Charlie’s Angels,” the lawsuit says.

Sony subsequently assumed the rights to the series from Spelling’s production company, but Wagner says he was never paid his share of the profits from the two “Angels” movies.

The first big-screen adventure, in 2000, took in more that $125 million in the U.S. alone, while the current sequel, “Charlie’s Angels: Full Throttle,” has so far grossed $67 million.

Lucy Liu and Cameron Diaz star in the movies with Barrymore, in TV roles originated by Farrah Fawcett, Jaclyn Smith and Kate Jackson.

Wagner’s lawsuit is demanding that Sony add profits from the movies to his share of the profits from the TV series.

“This has to do with whether or not his entitlement to a share in the television series extends to the movie,” said Wagner’s lawyer Samuel Pryor.

Sony has yet to comment on the lawsuit.

As this weekend’s box office results soberly showed, this summer’s much-ballyhooed sequels to “Legally Blonde” and “Charlie’s Angels” will be lucky if they make it to the $100 million mark.

So far, “Charlie’s Angels: Full Throttle” has taken in $82 million — not enough to cover its $144 million production costs (that’s not counting what it also took to market it) — and “Legally Blonde 2: Red, White %26 Blonde” has pulled in $63 million, the Los Angeles Times reports.

Other sequels delivering smaller-than-expected returns this year have been “2 Fast 2 Furious” (with $122 million) and “Terminator 3: Rise of the Machines” ($110 million), not to mention the outright duds “Rugrats Go Wild!” ($37 million) and “Dumb and Dumberer: When Harry Met Lloyd” ($25 million).

And while the situation is not enough to slam the brakes on a “Charlie’s Angels 3″ or yet another “Fast and the Furious,” corporate Hollywood is noticing that audiences won’t automatically flock to empty-headed movie franchises.

“If there was any hubris or arrogance to the industry’s approach, it’s that we got accustomed to believing ‘build it and they’ll come,’ ” Marc Shmuger, vice chairman of Universal Pictures, tells the Times. “What we’ve seen this summer is that movie audiences are declaring their independence of thought.”

Sony executives tell the paper that the strong foreign ticket sales for “Angels” — which stars Drew Barrymore, Cameron Diaz and Lucy Liu — may yet save the picture and may even justify another installment.

“It’s too early to tell,” said Amy Pascal, chairman of Sony’s Columbia Pictures. “I’m watching closely and hoping it will make sense.”

For the record, the summer’s successful sequels have been “The Matrix Reloaded” ($274 million) and “X2: X-Men United” ($213 million.) “Bad Boys II” opens Friday.

Miley Cyrus had slime on her mind Saturday at Nickelodeon’s 2008 annual Kids Choice Awards.

The teen superstar begged not to get showered with the green stuff while she accepted the award for Favorite Female Singer (she also won for Favorite TV Actress). “I don’t want to get slimed but I am glad to be here,” she told the screaming crowd.

Indiana Jones and the Kingdom of the Crystal Skull star Harrison Ford, who presented the award for Favorite Voice for an Animated Movie, got the green stuff dumped on him instead, adding his name to the list of slimmed celebrities, which includes Justin Timberlake, Nicole Kidman, Pink and Johnny Depp.

Later in the night, Cyrus was back on stage to rock the house with her tune, “G.N.O. - Girl’s Night Out.”

Cameron Diaz, who was introduced by Ashton Kutcher, said winning the Wannabe Award was even better than winning the Big Burp Award, which she took home a previous year. “Oh wow. And when I say wow, I mean, Wow!” she said. “This is the biggest honor in my entire life.”

Things got messy when Heidi Klum used darts to burst green slime balloons that filled the Mighty Slime Vat with a record-breaking amount of the oozing green stuff, which eventually ended up all over Black and Pirates of the Caribbean: The Curse of the Black Pearl star Orlando Bloom in a climactic ending to the show.