Possible Clues:

• ''Some Enchanted Evening'' introducer
• 'South Pacific' co-star
• Lana Turner's 'Mr. Imperium' co-star, 1951
• 1950 Tony winner for Best Actor in a Musical
• 1950 Tony winner born in Rome
• Co-star of Broadway's 'Fanny'
• He starred opposite Florence Henderson in 'Fanny'