Veteran pop/ballad singer Margaret Whiting, who opened a week's cabaret gig at Charlie's Georgetown last night, is getting directorial assistance from a source close to home -- child actor-turned-porno star Jack Wrangler, who is also her significant other of seven years.

Wrangler (the former Jack Stillman) has just released a tell-all autobiography, "The Jack Wrangler Story," cleverly subtitled "What's a Nice Boy Like You Doing?" Wrangler hasn't given up his career -- he wrote the theme song for his last film, "The Devil in Miss Jones, Part II," and says his new movie, "Jack and Jill Part II," is due out soon.

Whiting, 56, began singing for Johnny Mercer's Columbia Records when she was 15 and had a string of million-selling hits with "That Old Black Magic," "It Might as Well Be Spring" and "Baby, It's Cold Outside." Her father, Hollywood tunesmith Richard Whiting, penned her first hit, "My Ideal." Lately she's been touring with the "4 Girls 4" revue, along with Rose Marie, Helen O'Connell and Rosemary Clooney.

Together, Whiting and Wrangler are putting together a show called "I Remember Johnny: The Magic of Mercer," which they hope to take on the road in January.