Lisa Marie Presley is engaged again. The only child of Elvis Presley, whose 20-month marriage to Michael Jackson ended in 1996, will wed John Oszajca, a Hawaiian-born musician, her publicist confirmed Tuesday. This will be her third marriage; she has two children with her first husband, Danny Keough. Oszajca’s 25, Presley’s 31. No date has been set. The couple met last May and became engaged just before Christmas, when Oszajca went to Lisa Marie’s mother, Priscilla Presley, and asked “for her daughter’s hand in marriage,” said spokesman Paul Bloch. After receiving her approval, Oszajca formally proposed to Lisa Marie. Both the prospective bride and groom have albums in the works. Oszajca plans to release his first album, “From There to Here,” this year, while Lisa Marie is in the studio recording hers (her first), said Bloch.