By Stephen M. Silverman
August 29, 2001 07:49 AM

COMPLAINED: Taran Noah Smith, 17, who for eight seasons played the youngest of the three sons on ABC’s “Home Improvement,” is fighting his parents for access to his $1.5 million trust fund. He says that the only major piece of his property that he’s been able to pry loose from them is a 1979 Lincoln that drove him and his wife, 33, to Kansas, where they are staying temporarily with an attorney. Smith’s parents call his allegations untrue . . . SCHEDULED: After his new music CD, “Private Radio,” arrives in stores on Sept. 25, Billy Bob Thornton, 46, will open Oct. 9 at the Warner Theater in Washington, D.C. His concert tour will also include stops in Chicago, New York City, Austin and L.A., reports USA Today . . . UNITED: Muhammad Ali, Michael Douglas, Antonio Banderas and Melanie Griffith are among those who have signed a pledge called Say Yes for Children, part of a global campaign led by a team of children’s organizations. The campaign, say organizers, has gathered more than 3.2 million pledges worldwide since April, including those of scores of celebrities, Heads of State, and other leading citizens. The pledges are due to be presented to national leaders gathering in New York in September for a first-ever global summit on children. The Say Yes pledge form can be found online at . . . CAST: Ex-“Dallas” star Linda Gray, 60, is the latest older woman to step into the bedroom of Benjamin Braddock in the London stage production of “The Graduate.” Oct. 1 she is set to succeed “Fatal Attraction” actress Anne Archer, 54, in the role, which Kathleen Turner originated last year. Turner, 47, is slated to take the play to Broadway next spring.