Q. How has success changed youngster Macaulay Culkin, the "Home Alone" star?

A. He may be a $200 million boy, but he still talks like a 10-year-old. "We ride and bike and do stuff like that," he explains. But his agent is somewhat more expansive. "If environmental groups knew how much paper was being spent on" Culkin, says Paul Feldsher of International Creative Management, reflecting on the inundation of scripts, "I think we could save a rain forest somewhere." Next up for Culkin is Columbia's "My Girl," for which he will take away a reported $1 million.Q. Give some information on Mark Hamill of the "Star Wars" trilogy. What has happened to him? - Mrs. T., Dearborn, Mich.

A. The movies made Hamill, now 38, a millionaire and able to pick his spots. He did "The Elephant Man" and "Amadeus" on Broadway. He turned up on TV in February as The Trickster, a villain in "The Flash."

Q. A few years ago, I saw the movie "The Outsider" about the Indian who raised the flag on Iwo Jima. Who starred? Is it on video? - B.E., New Haven, Conn.

A. According to critics, Tony Curtis gave one of his best perfomrances as Ira Hamilton Hayes, the Pima indian who one of the Marines who raised the flag. Hayes was unable to cope with civilian life and committed suicide in 1955. The 1961 movies is not on tape.

Q. No one at our party could remember who starred in "The Moon Is Blue" with William Holden. Who was she? - Terre Haute, Ind.

A. Maggie McNamara was the girl. She did only three more movies: "Three Coins in the Fountain," 1954; "Prince of Players," 1955; and "The Cardinal," 1963. She was found dead of an overdose of barbituates in 1978.

Q. I'm a great admirer of Max von Sydow. Tell me about him - age, nationality. How many films has he done? - R.B., Bridgeport, Pa.

A. Von Sydow, 62, Swedish, has too many films to list, most made in Europe. He's especially known for his work in Ingmar Bergman films. Among his U.S. movies were "The Greatest Story Ever Told" (as Christ), "Hawaii," "Three Days of the Condor," "Exorcist II: The Heretic." He was nominated for an Oscar for 1988's "Pelle the Conqueror." His latest is "Awakenings."

Q. I've checked every video store and none has John Astin's delightful comedy "Evil Roy Slade." Where can I get the tape? - H.B., Glendale, Calif.

A. The 1971 western spoof with Astin, Edie Adams, Milton Berle and (in a small role) John Ritter isn't available on videocassette. As we've said before: Not all movies make it and TV movies are less likely to be found on tape than features. The producers have to see a market out there to pay for the expense.

Q. Haven't I seen Hayley of "All My Children" before? How did she earn her role in the show? - A.M.C., Croydon, Pa.

A. Troubled teen Hayley Vaughn is Kelly Ripa's first professional TV acting job. Ripa's from Berlin, N.J., and studied at Camden (N.J.) Community College before landing the role through an audition. She started acting in high school and since then, has done local theater and industrial films.

Q. Help! I say Andy on "One Life to Live" and Brenda on "Beverly Hills 90210" are the same person. My friend disagrees. We've got 10 bucks riding on who's right. - L., Atlanta.

A. Pay up. Bronwen Booth plays Andy Harrison on "OLTL." She's done other soaps but only as a day player - no regular roles. Shannen Doherty is Brenda in "Hills." You may remember her from NBC's "Our House." Doing two shows would be tough if both were produced in the same town, but "OLTL" is based in New York and "Hills" is in California. Coast-to-coast commuting is usually reserved for important stars.

Q. What does Joni Mitchell, a survivor of folk and rock, think about changes in music?

A. "I've always thought about the spirits of music, you know," says Mitchell, whose new album is "Night Ride Home." "Like rock 'n' roll: People keep writing songs about how rock 'n' roll will never die. Well, rock 'n' roll died a long time ago. It never even made it into the '60s. The roll went out of it. What died was the push beat, the remnant from swing and boogie-woogie. And when it died, what was left was just rock . . . A certain joy went out of rock 'n' roll, and what was left was a militancy - which I guess makes sense because of the times."

Q. How is actress Ally Sheedy bearing up under those mean-spirited reviews of her new book of poetry?

A. Sheedy, 28, makes no secret that her book, "Yesterday I Saw the Sun," helped heal some of the deep wounds she has suffered as a child star. Although she enrolled in a workshop on hostile questions before the press tour, Sheedy still wasn't really prepared for charges that she was just trying to make a buck off her fame. Her early success, starting with the American Ballet Theater at age 8 and publication of a children's book at 12, was coupled with bulimia, a teenage abortion, drug addiction and attempted suicide. After rehabilitation at the famous Hazelden Clinic, Sheedy wrote the poems "because I needed to write them. . . . It's about recovery."

Q. Isn't actor Peter Boyle having a rough bout with serious illness?

A. Boyle, best known for "Joe" and other '70s films, suffered a stroke a year ago. He smoked cigarettes, and his lifestyle wasn't the healthiest. Since then, he has lost weight and is taking better care of himself. He's back in front of the camera making "Nervous Ticks," a comedy about murder. "I'm completely recovered," says Boyle, 55. "Living agrees with me."

Q. "Northern Exporsure" is the best-written, best-acted program I've seen in years. I'd like to know about Rob Morrow. What's he been in and what's his address? - G.L., Atlanta.

A. Morrow's from New Rochelle, N.Y., studied acting in New York and has been in more than 20 plays and the TV series "Tattinger's," as well as guest roles in "Spenser for Hire," "Fame" and "Everything's Relative." He made his feature bow in 1986 in "Private Resort." Write: CBS-TV, 7800 Beverly Blvd., Los Angeles, Calif. 90036.

Q. Tell me about the actress who portrayed Lucille Ball in "Lucy and Desi: Before the Laughter." She looks so much like the girl who played Julie on "All My Children." Are they one and the same? - J.O., Princeton, Ill.

A. Frances Fisher played Lucy. She is a soap opera veteran, as Donna Saxon in "The Edge of Night," but most of her credits are in off-Broadway plays and minor TV and movie roles. It was partly because she was not well-known, as well as her resemblance to Lucy, that she landed the role. Fisher, 39, was born in England and traveled extensively as a child with her father, who was in the construction business. She went to high school in Texas and started in theater in Virginia. Lauren Holly was Julie in "AMC."

Q. Give me some stats on Chris Young of "Married People," age, married, address. - M.B., Sterling Heights, Mich.

A. Young, 20 on April 28, was still in high school when he commuted to Los Angeles in 1987 to play computer whiz Bryce Lynch in "Max Headroom." He's also done CBS' "Live-In," the feature "The Great Outdoors" and the TV movie "Dance Till Dawn." He's single.

Q. We saw Megan Gallagher in "Law and Order." Seems like a long time she has been in anything. Wasn't she a regular in a series? The same about Peggy Smithart of "Sons and Daughters." - K.M.L., Thorton, Colo.

A. Gallagher has three high-profile regular TV roles to her credit. She was Tina Russo on "Hill Street Blues," Judy Ralston on "The Slap Maxwell Story" and Wayloo Marie in "China Beach." Smithart's work has been in fringe-time series; recurring roles on the soaps "Ryan's Hope," "One Life to Live," "Another World" and "Loving"; and in the CBS late-night series "Diamonds," which moved to cable in 1988.

Q. Settle this between friends: My friend insists that Garry Marshall is Penny Marshall's father. I say he's her brother and hired her for "Laverne & Shirley." - L.V., Burns, Ore.

A. Garry is Penny's brother, and he did give her her start, in a bit role in the pilot for his series "My Friend Tony." By the time she did "L&S," Penny was an established comedy actress with regular roles in "The Odd Couple," "The Bob Newhart Show," and "Paul Sand in Friends and Lovers." The Marshalls' father did work on "Laverne & Shirley." In fact, the whole Marshall family was involved, Garry as executive producer, father Tony Marshall as producer and sister Ronny Hallin as associate producer.

Q. Give some background on Penny Marshall of "Laverne & Shirley." What is she doing now? - H.B., Philadelphia.

A. Marshall was born in New York on Oct. 15, 1942, attended the University of New Mexico and got into show business teaching dancing and working in summer stock. She's been married twice (second husband was Rob Reiner) and has a daughter, Tracy, 26, from her first marriage. Marshall started directing with an episode of "L&S."\