EXPECTING. Twiggy, 28, London's wispy, doe-eyed model turned singer, and Michael Witney, her actor husband; their first child; in November. Twiggy, who is 5 ft. 6 in. tall, weighed 91 lbs. at the height of her career, has now ballooned to 112 lbs., and is embarking on a diet to stave off pregnancy pounds. She faces childbirth philosophically: "It's all a bit scary in a way because it's the first one. But then people have them in forests and rice fields, don't they? And they all seem to manage."

MARRIED. Prince Michael of Kent, 36, handsome first cousin of Queen Elizabeth II, whose diversions have included international bobsledding and fast cars; and Baroness Marie-Christine von Reibnitz, 33, an aristocratic Austrian interior designer; he for the first time, she for the second; in Vienna. Because his bride is a Roman Catholic (her first marriage was annulled), Prince Michael was obliged under the Act of Succession of 1700 to renounce his place as 16th in line to the British throne.

DIED. Bob Crane, 49, genial star of television's long-running comedy series Hogan's Heroes; of repeated blows to the head by an unknown assailant in his hotel room; in Scottsdale, Ariz., where he was appearing in a play. Crane found success first as a dance-band and symphony drummer, then as a clowning disc jockey. In 1965 he abandoned a $150,000-a-year radio post on KNX in Los Angeles to risk acting in a new CBS-TV comedy series about American prisoners of war in a German concentration camp. The show was an unexpected smash, and Crane, as the P.O.W.s' brash, resourceful ringleader, Colonel Hogan, became one of the most familiar faces on television.

DIED. Mstislav Keldysh, 67, prominent Russian mathematician who helped shape his country's space program; in Moscow. His own research centered on rocketry and spacecraft, but as chief of the Soviet Academy of Sciences from 1961-75, Keldysh oversaw a national network of scientific projects and organizations. His working knowledge of English helped him maintain contacts with many Western scientists, and he professed a desire for Soviet-American cooperation in space research.

DIED. Clifford Dupont, 72, first President of Rhodesia after the African country established itself as a republic in 1970; of cancer; in Salisbury. A dapper London-born soldier who practiced law before turning to politics, Dupont helped draw up the Unilateral Declaration of Independence that first cut Rhodesia's ties with Great Britain in 1965 and reaffirmed white minority rule. As head of state under Prime Minister Ian Smith (he was, he once said, politically far to the right of Smith), he appropriated not only the powers of British Governor Sir Humphrey Gibbs but also his vintage Rolls-Royce. In 1975, he retired to tend his tobacco farm.

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