England's royal wedding will be telecast live on all three major networks tomorrow morning. NBC will begin its coverage at 4:30 a.m. with Tom Brokaw, Jane Pauley and John Chancellor in London; Barbara Walters and Peter Jennings will start reports at 5 a.m. for ABC; and CBS will commence its coverage at 5 a.m. with anchors Dan Rather and David Frost.

Coverage on all networks follows roughly the same schedule: Reports begin with the procession of Prince Charles and the royal family from Buckingham Palace, and Lady Diana Spencer from Clarence House, to St. Paul's Cathedral. The wedding ceremony itself begins at roughly 6 a.m. eastern time and continues until roughly 7:15 a.m.

Afterward, all networks will follow the procession of the royal family and the newlyweds back to Buckingham Palace. Between 8:45 and 9 a.m. the prince and his bride will greet crowds from the palace balcony; then they will attend a private reception. About 11 a.m., the honeymoom procession will leave the palace. The live coverage will be interspersed with reports on related wedding events.

For those who prefer not to rise early, all three networks will air edited replays of the day's highlights during prime time. CBS will broadcast its summary at 8 p.m.; ABC's will air at 9 p.m.; and NBC's at 10 p.m. Channel 26 will offer the PBS edited replay, from BBC coverage, between 8 and 11 p.m.

Tonight, all three networks feature preview reports on last-minute preparations and wedding-eve festivities. ABC's airs at 8, NBC's at 10 and CBS' at 11:30.